Keep Your Cool In Truckee

May 4th, 2012 by theautodoctor

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Truckee drivers rely on their car’s coolant system to keep their engine cool. Coolant (also called antifreeze) mixed with water flows through your Subaru or 4 wheel drive engine and absorbs heat. The mixture then flows out to the radiator where it’s cooled by air flowing over the radiator. From there the coolant/water mix circulates back through the engine to absorb more heat.

There’s a reason we mix coolant and water. Water alone actually does a good job transferring heat from the engine. The problem is that water boils at a temperature that’s easily reached inside your Subaru or 4 wheel drive’s engine, so it can turn to steam which does not conduct heat as well and is harder to contain.

Also, if it’s freezing outside in Truckee, the water in your engine could freeze while your vehicle is sitting out in the cold.

So, if you remember your Truckee high school chemistry, you’ll know that a mixture has both a higher boiling point and a lower freezing point than either component alone.

Coolant, or antifreeze, is specially formulated to keep your engine safe in a wide range of environmental and operating temperatures in and around Truckee.

Keep Your Cool In Truckee Whenever the Subaru or 4 wheel drive is running, the coolant in the cooling system is working to keep your engine from overheating. When it’s cold outside, the coolant acts as antifreeze to keep the fluid from freezing in your engine.

All that exploding fuel in your engine creates a lot of heat. Without coolant, the metal Subaru or 4 wheel drive engine parts would expand so much that the engine would seize up and stop running. Expensive parts could be broken or warp so badly they would have to be replaced. It could even be so bad that the whole Subaru or 4 wheel drive’s engine is ruined and has to be junked.

This is why it is critical that Truckee drivers check coolant levels frequently and have their Subaru or 4 wheel drive cooling system inspected for leaks. Also your Subaru or 4 wheel drive manufacturer has a maintenance requirement for draining and replacing your coolant. These recommendations can vary widely, so check your owner’s manual or ask us at The Auto and Tire Doctor in Truckee.

The reason you need to change the coolant is that it has additives in it to protect the cooling system. As you can imagine, with all the heat, the cooling system’s a pretty harsh environment. The additives keep the fluid from becoming corrosive and damaging the radiator and other Subaru or 4 wheel drive cooling system components. Over time, the additives are depleted and the coolant just has to be replaced.

Many Truckee auto owners ask The Auto and Tire Doctor why there are different colors of antifreeze. It is very important that you use the correct type of antifreeze. The different types of antifreeze – or coolant – are different colors so you don’t mix them up.

Auto manufacturers use different materials to make the cooling system, and they require different types of antifreeze to protect them.

So check with us at The Auto and Tire Doctor or your owner’s manual for the right kind because using the wrong coolant can void the warranty for your Subaru or 4 wheel drive cooling system.

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Give Your Engine Clean Fuel With A New Fuel Filter From The Auto and Tire Doctor

April 27th, 2012 by theautodoctor


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Your Subaru or 4 wheel drive requires plenty of clean fuel to run. When your fuel isn’t clean, your fuel injectors can start to become clogged up. When this happens, your Subaru or 4 wheel drive engine may not get the proper amount of fuel at the correct pressure to run efficiently. This hurts fuel economy and performance as you drive around Reno NV. It can also lead to the buildup of harmful deposits on valves and in the combustion chamber.

That’s why all vehicles, including Subaru or 4 wheel drives, come equipped with a fuel filter somewhere between the engine and the fuel tank. Give Your Engine Clean Fuel With A New Fuel Filter From The Auto and Tire DoctorThe job of the filter is to clean out little pieces of dirt and contamination. The filter captures the contaminants and holds them out of the fuel stream. Of course, the filter will eventually get clogged up and need to be replaced at The Auto and Tire Doctor.

If your fuel filter is clogged, the Subaru or 4 wheel drive engine can’t get all the fuel it needs, and it may sputter at high speeds or quick acceleration. Many fuel filters have a bypass valve that will allow unfiltered fuel through when they are clogged. This keeps your engine running, but doesn’t protect it from contaminated fuel.

You may find that you need to change your fuel filter at The Auto and Tire Doctor more frequently as your Subaru or 4 wheel drive ages. Over the years, additional sediment and rust accumulates in the fuel tank and can be drawn into the fuel system. Your fuel filter stands guard at the gates to your engine to protect expensive parts and to maintain performance and fuel economy.

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Serpentine Belt Service At The Auto and Tire Doctor In Truckee

April 19th, 2012 by theautodoctor


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If you’ve ever heard a squealing sound under your hood, chances are it was your serpentine belt. Your serpentine belt is a long belt that’s driven by your engine. It winds around several accessories that power important automotive systems in your Subaru or 4 wheel drive. Let’s go over them.

First, the serpentine belt drives your air conditioning system. It spins the compressor that makes the cool air that takes the edge off the summer heat in Truckee.

Serpentine Belt Service At The Auto and Tire Doctor In TruckeeNext, the belt powers the alternator
. The alternator creates electricity that’s used by your Subaru or 4 wheel drive’s electrical systems and also charges your car battery. Without the alternator, the battery will go dead in a few miles.

The serpentine belt may also run the pumps for both the power steering (some are electric) and power brakes (some use vacuum boost).

And, on most Subaru or 4 wheel drives, the serpentine belt powers the water pump. The water pump circulates coolant through the engine to keep it within normal operating temperatures. On some Truckee cars, the water pump is powered by the timing belt instead of the serpentine belt.

When they understand what it does, Truckee drivers realize that if it breaks, it affects a lot of systems. That’s why manufacturers have recommended that it be changed every so often so that it doesn’t fail.

At The Auto and Tire Doctor, we can perform a visual inspection of the belt to see if it has any cracks that signal the belt could fail soon. If the belt has more than three or four cracks every inch, has deep cracks that penetrate half the depth of the belt, is frayed, is missing pieces or has a shiny glazed look, it needs to be replaced regardless of age or mileage.

If it has lost a significant thickness, it also needs to be replaced. There’s a special spring-loaded pulley attached to the engine called the tensioner pulley. Its job is to make sure there’s a constant tension on the serpentine belt so that it doesn’t slip. The spring can become worn and no longer provide the necessary pressure to keep the belt tight. At The Auto and Tire Doctor, we recommend that the tensioner be replaced at the same time as the serpentine belt.

As mentioned, a squealing sound could be a sign that the serpentine belt needs to be replaced. It may be loose if you hear a slow, slapping sound when idling your Subaru or 4 wheel drive.

All in all, the serpentine belt’s an important part for the function of your Subaru or 4 wheel drive. And it’s not that expensive to replace at The Auto and Tire Doctor – so it’s good to do so before it fails.

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Power Steering Service At The Auto and Tire Doctor In Truckee

April 13th, 2012 by theautodoctor


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Many Truckee drivers have been hearing about new advances in power steering technology, specifically, electric power steering. Some very high-end cars have been featuring electric power steering for a few years. An electric motor directly provides the power assist to make steering easier. Undoubtedly we’ll see much more of this in Truckee as full electric cars and electric hybrids become more common.

The vast majority of cars and trucks serviced at The Auto and Tire Doctor in Truckee use a hydraulic power boost system. With hydraulics, fluid is pressurized by a pump which actuates a hydraulic cylinder to reduce steering effort. Some of these pumps are powered by an electric motor. Most pumps are powered by the serpentine belt driven by the engine.

Power Steering Service At The Auto and Tire Doctor In TruckeePower steering fluid has the necessary hydraulic properties and the ability to lubricate the internal parts. The power steering fluid also protects Subaru or 4 wheel drive components from rust and corrosion.

Truckee car owners should be aware that manufacturers recommend that the fluid be replaced on schedule.
At The Auto and Tire Doctor, the old fluid is drained and the system cleaned thoroughly. Fresh fluid is then installed.

Unfortunately, many Truckee people don’t realize how important it is to service their power steering, or even that it should be done at all. A neglected power steering system can develop leaks and the pump won’t last as long.

Signs that you may be having problems with your power steering include the need to constantly add power steering fluid, a loud whining from the pump, erratic power assist or high steering effort. If you’re experiencing any of these problems, have your power steering checked out at The Auto and Tire Doctor in Truckee.

In addition to the pump and hydraulic system, there are mechanical parts in the steering system. The rods, arms, joints and knuckles that actually turn the wheels can become worn or damaged. A standard alignment service includes an inspection of steering components.

If you notice any play in the steering wheel, that the steering wheel is off center, or a noise coming from your front wheels, especially when turning, have your The Auto and Tire Doctor advisor do an inspection so the problem can be corrected. Waiting too long could cause uneven tire wear and may even lead to steering failure. Call The Auto and Tire Doctor today at 530 587-2178.

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Another Couple of Years: Making Your Vehicle Last At The Auto and Tire Doctor

April 5th, 2012 by theautodoctor


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A while back, the Cash for Clunkers program was all over the news. Truckee people could trade in their old vehicle for a new one that got better fuel economy and receive a government rebate.

A lot of Truckee motorists had so-called clunkers that they wanted to keep. They’re good commuters, grocery getters or toy haulers. They enjoy that fact that they’re paid off, or soon will be. They would gladly like to keep their Subaru or 4 wheel drives for 200,000 miles or more – as long as it’s economical to do so.

There are plenty of Truckee drivers whose vehicles are running after 150,000 or 200,000 miles. We can learn from what they’re doing to keep our own Subaru or 4 wheel drives on the road in California.

Truckee drivers of high-mileage cars often report a common denominator of never skipping an oil change. Another Couple of Years: Making Your Vehicle Last At The Auto and Tire DoctorThat may sound a bit unsophisticated, but it’s really not. First off, oil is the life blood of your Subaru or 4 wheel drive’s engine and it needs to be clean to properly lubricate. Skipping oil changes leads to clogged oil filters and sludge that can damage your engine.

There’s another reason why the scheduled oil change is so important for Truckee car owners. It’s simple – a The Auto and Tire Doctor professional is going to be looking at your car. All of your fluid levels will be inspected and topped off so they won’t get so low that damage can be done. If there is a significant fluid loss, let’s use brake fluid as an example, your The Auto and Tire Doctor technician can look for the cause of the loss and find the problem before it leads to an accident or costly repair.

Your The Auto and Tire Doctor advisor will also visually inspect your Subaru or 4 wheel drive for worn belts and hoses, uneven tire wear, leaking shock absorbers and more. Problems get addressed before they lead to repairs that cost more than the car’s worth.

And your The Auto and Tire Doctor advisor will be able to remind you of other services that the factory recommends you get done. Just think of that oil change the same way as you do about going to your Truckee dentist for your six month cleaning and checkup. Don’t skip it.

Realistically, things are going to wear out as your Subaru or 4 wheel drive gets older. On the way to 200,000 miles you’ll go through several batteries, probably a couple of alternators and water pumps, a set of shocks and likely some brake rotors.

Of course, these things cost money, but they are far cheaper than new Subaru or 4 wheel drive payments. With proper service at The Auto and Tire Doctor and regular inspections, you’ll keep surprise repairs to a minimum and more money in your wallet.

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The Auto and Tire Doctor: Good Service And Good Fuel Economy

March 28th, 2012 by theautodoctor


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Most of our Kings Beach clients want to save on gas and seek our advice on improving fuel economy. At The Auto and Tire Doctor, we are frequently asked, however, just how much money Kings Beach motorists can actually save.

Well the US government has a website dedicated to helping us use less fuel. It presents the cost savings in a way Kings Beach car owners can relate to and is relevant for all vehicles. Let me give you an example: Having your Subaru or 4 wheel drive engine properly tuned, can save up to 4%. If you’re paying three-fifty for a gallon of gas, you could save fourteen cents a gallon.

The Auto and Tire Doctor: Good Service And Good Fuel Economy

In today’s The Auto and Tire Doctor post, we’re going to talk about several things you can do to improve your Subaru or 4 wheel drive fuel economy driving around Kings Beach. We’ll tell you the potential savings per gallon of gas at three dollars and fifty cents, and we’ll show a graphic that also shows the savings at three and four dollars.

DOLLARS PER GALLON $3.00 $3.50 $4.00
TUNE UP 4% .12 .14 .16

The next item is replacing a clogged engine air filter. Your engine needs enough air to burn fuel efficiently for the best economy. A clean air filter means you get plenty of air. The fact that the air’s clean protects your engine. That can save you up to ten percent or thirty-five cents a gallon.

DOLLARS PER GALLON $3.OO $3.50 $4.00
AIR FILTER 10% .30 .35 .40

Fixing a faulty oxygen sensor can improve economy by up to forty percent. That’s a whopping dollar forty in savings per gallon. Bring your car to The Auto and Tire Doctor and we’ll check your oxygen sensor.

DOLLARS PER GALLON $3.00 $3.50 $4.00
FAULTY O2 SENSOR 40% 1.20 1.40 1.60

Chances are that if your oxygen sensor is kaput your check engine light will come on. Now, there’s any number of things that could cause your check engine light to come on besides oxygen sensor problems. But if it’s on, get it checked out as soon as you can at The Auto and Tire Doctor.

Here’s an easy one. Inflate your tires to the recommended pressure. That could save you three percent or eleven cents a gallon. Even a little drop in pressure will cost you at the pump so check your tires every week.

DOLLARS PER GALLON $3.00 $3.50 $4.00
TIRE INFLATION 3% .09 .11 .12

Your Subaru or 4 wheel drive manufacturer has recommended a specific weight of motor oil. The recommendation is based on engine design and will give you the best protection. Using a heavier weight could cost one to two percent in reduced fuel economy, or up to seven cents a gallon.

DOLLARS PER GALLON $3.00 $3.50 $4.00
RIGHT GRADE MOTOR OIL 2% .06 .07 .08

Here’s one that’s free: Take it easy when you drive. Aggressive driving (we’ve all seen this on Kings Beach roads), rocketing away from stop lights, standing on the brakes, punching it for lane changes – really takes a toll on your fuel economy.

Cutting out aggressive driving around Kings Beach can save five percent or eighteen cents a gallon. Now on the highway it gets really costly: thirty three percent or a buck sixteen a gallon. Think about that.

DOLLARS PER GALLON $3.00 $3.50 $4.00
DRIVE AGRESSIVELY – MIN. 5% .15 .18 .20
DRIVE AGGRESSIVELY – MAX. 33$ .99 1.16 1.32

 A related item is exceeding the speed limit. For example, if the speed limit is sixty miles per hour an additional five miles will cost seven percent or twenty-five cents a gallon. Fifteen miles per hour will cost you upwards of eighty cents a gallon.

DOLLARS PER GALLON $3.00 $3.50 $4.00
SPEED LIMIT – MIN. 7% .21 .25 .28
SPEED LIMIT – MAX. 23% .69 .81 .92

The last thing we’ll talk about is excess weight. Our Subaru or 4 wheel drives tend to accumulate a lot of things and the weight adds up. Clear out the trunk and only haul stuff when you really need it. For every one hundred pounds you can save two percent or seven cents a gallon.

Sorry honey, your brother can’t come with. It’d cost an extra thirty cents a gallon.

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The Auto and Tire Doctor And The Maintenance Mindset

March 21st, 2012 by theautodoctor


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When it comes to their vehicles, some Reno NV people don’t have a maintenance mindset. They know they need to take care of their cars, but it just seems really hard to get them to remember to do it. Reno NV drivers generally accept that many things in life require regular maintenance, but just may have not applied it to their Subaru or 4 wheel drives.

For example: the lawn. You water it and mow it every week. And weed the flower beds and rake the leaves. The Auto and Tire Doctor And The Maintenance MindsetThere are other things that Reno NV people are good about maintaining. Going to the dentist twice a year. Clothes to the dry cleaner. Flu shots. Taking the kids to your Reno NV doctor for a checkup before school starts.

So Reno NV people really are maintenance minded. They just have to learn to apply that mindset to cars. I mean, if you never brush your teeth or go to the dentist, you’ll become painfully aware of your neglect when you get a big cavity. Once the damage is done, we learn our lesson and start to take better care of things.

Unfortunately, Reno NV Subaru or 4 wheel drive owners too often learn the hard automotive lesson when they bring their vehicle to The Auto and Tire Doctor on a tow truck. So many times a little routine maintenance would have prevented a breakdown.

So how can Reno NV drivers get into the habit of taking care of their Subaru or 4 wheel drive? It’s so easy to forget. If you skip cutting the grass, you see it every time you pull in the driveway.

Here’s something that will help: The key to good vehicle maintenance starts with the oil change. Think about it – when you go in for a full-service oil change, your The Auto and Tire Doctor tech will check all your fluids. If one of them is low, he can look for the reason why. If your serpentine belt is cracked, he’ll see it and let you know. Corroded battery cable – they’ve got you covered. And at The Auto and Tire Doctor, we check to see if your Subaru or 4 wheel drive manufacturer has recommended any services at your current mileage.

The oil change becomes kind of a focal point, a way to check in to see what needs to be done.
The fact is that vehicle inspection surveys consistently reveal that over 80% of vehicles have one or more unperformed repair or maintenance service. Vehicles are generally very reliable and can take a lot of abuse and neglect. But, you’ve got to remember that Subaru or 4 wheel drives are complicated machines. There are parts and fluids that are critical to their function. Without them, the Subaru or 4 wheel drive won’t run at all.

So when you come in to The Auto and Tire Doctor for an oil change, you get a visual inspection from your honest, friendly service advisor and a reminder for recommended services so you can avoid a total failure. And remember that your The Auto and Tire Doctor service advisor can help you work out a maintenance and repair plan, prioritizing and scheduling the work to make sure you and your family are safe, and avoid expensive breakdowns.

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Gas Savings In Truckee: Sharpen Your Pencil

March 16th, 2012 by theautodoctor


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High gas prices in Truckee have hit most of our budgets. You’ve probably budgeted a certain amount for vehicle related stuff. Increased fuel costs are now consuming a bigger portion of that budget and you may be tempted to skimp in some other areas – like scheduled maintenance.

According to news reports and industry studies, you’re not alone. Nine out of ten personal vehicles on the road have at least one maintenance or repair item that hasn’t been done. Some of these items are serious safety concerns. Others are just more likely to affect the cost of operating your vehicle.

Gas Savings In Truckee: Sharpen Your PencilIn this area, we can take a lesson from professional Truckee vehicle owners. I’m talking about fleet owners and operators. You know, Truckee folks like the trucking companies and delivery services. Because their livelihood depends on it, they have gotten scheduled maintenance down to a science. And the last thing they skimp on is regular maintenance.

Why is that? Well, for one thing they know that routine maintenance prevents expensive repairs and costly breakdowns. They also know that a well-maintained vehicle uses less fuel. For them, even a small decrease in fuel economy may mean not being profitable.

So what does this mean to Truckee drivers? Well, there’s a ninety percent chance that you’re missing some service that would improve your fuel economy. Here’s a quick reminder list:

Fuel system cleaning, transmission service, differential service, engine air filter, wheel alignment, oil change, tune up.
Ring any bells? Can you honestly say that there isn’t at least one thing on the list that hasn’t been done?

Let’s suppose you chose to spend one hundred and fifty dollars and get caught up on some of these services at The Auto and Tire Doctor. Figure that they combine to improve your fuel economy by fifteen percent. What would that mean to your pocketbook?

Well, the average personal vehicle in Truckee is driven about twelve thousand miles a year. If you get twenty miles per gallon in your Subaru or 4 wheel drive, over the course of one year you would pay for the hundred and fifty dollars worth of service and save an additional hundred and sixty five dollars if gas is at three dollars and fifty cents. If gas is four fifty, you would save two hundred and fifty-five dollars. And you’d rack up savings of three hundred and forty five dollars with gas at five and a half bucks.

GAS PRICE
$3.50
$4.50
$5.50
20 MPG
$165
$255
$345

From this you can see that the more fuel costs, the more it pays to take care of your Subaru or 4 wheel drive. Some of us drive trucks in Truckee for work or recreation – or want a large SUV for family needs. A fifteen percent improvement in fuel economy can generate huge savings – six hundred and sixty dollars a year if gas is four fifty a gallon in Truckee. Take a look at this table to see where your savings could lie.

GAS PRICE $3.50 $4.50 $5.50
10 MPG $480 $660 $840
20 MPG $165 $255 $345
30 MPG $60 $120 $180

 

So catch up on those services you’ve been neglecting at The Auto and Tire Doctor. Get a couple done now and a couple next time. Chances are you’ll save a lot of money at Truckee gas pumps this year – and a lot more on repairs in years to come.

 

 

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Air Conditioning Maintenance At The Auto and Tire Doctor In Truckee

March 6th, 2012 by theautodoctor


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Warm weather or cold, Truckee drivers still need to think about their Subaru or 4 wheel drive’s air conditioning. Most Truckee people don’t service their air conditioning until after it fails. At The Auto and Tire Doctor, we can advise you on your vehicle manufacturer’s preventive maintenance schedules for air conditioning service, just as we do for transmission service, oil changes and so on.

air conditioningMaintaining your air conditioning system means that you always have enough refrigerant to properly do the job. Small leaks in the Subaru or 4 wheel drive’s air conditioning system allow the refrigerant to escape and the system can’t cool the air as well. We see that a lot at The Auto and Tire Doctor in Truckee.

The refrigerant also contains a special oil that lubricates air conditioning components, and keeps the seals resilient. Low refrigerant and lubricating oil means that the air conditioning parts will wear out prematurely, and all Truckee car owners know that air conditioning repairs can be costly. At The Auto and Tire Doctor, we recommended that the air conditioner be run regularly, even during winter months, to keep the parts and seals lubricated.

Corrosion is what leads to many air conditioning system failures for Truckee motorists. The small leaks mentioned earlier also mean that air and water can leak into the air conditioning system. This can lead to rust and dirt in the internal workings of the air conditioning components. This greatly accelerates wear and, ultimately, failure.

Air conditioning service at The Auto and Tire Doctor starts with a visual inspection of the components for signs of damage or leaks. The compressor is driven by a belt from the engine, most often the serpentine belt, so it’s inspected for cracks or wear. The air conditioning compressor and other components are checked for proper operation. Then comes the leak test. If a leak is detected, often in a hose or connection, it’s repaired and the system is retested.

Then the old refrigerant is evacuated and the system is recharged with clean, fresh refrigerant. A final test insures that the Subaru or 4 wheel drive’s air conditioner is working, and you’re on your way.

How often this should be done varies from vehicle to vehicle. Your Subaru or 4 wheel drive owner’s manual will have the manufacturer’s recommendation and, of course, your The Auto and Tire Doctor service advisor can tell you. It’s typically every two years.

If you’re not getting enough cool air you know something’s wrong. Also, if you hear strange sounds when you turn the air on, there might be a problem with the compressor and you should get it checked out at The Auto and Tire Doctor. Replacing a bad A/C clutch in a Subaru or 4 wheel drive is cheaper than waiting for it to ruin the compressor.

Truckee drivers need to be aware that there’s one more thing that isn’t directly related to air conditioning service, but does impact the quality of the air in your Subaru or 4 wheel drive. And that’s your cabin air filter. This filter cleans dust, pollen, pollution and other impurities in the air that comes from the heater and air conditioner. The cabin air filter needs to be replaced when it’s dirty. If you don’t it’ll start to smell. Not all vehicles have one, so ask your The Auto and Tire Doctor service advisor to check your cabin air filter at the same time they’re doing your air conditioning service.

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How to Know When to Change Your Oil At The Auto and Tire Doctor

February 29th, 2012 by theautodoctor


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Today in the The Auto and Tire Doctor auto care blog, we’re going to talk about oil change intervals. It seems that as engine technology advances, recommended oil change intervals have gotten longer for The Auto and Tire Doctor customers. High quality oil in a well-engineered Subaru or 4 wheel drive engine has lead to extended intervals. But it’s also lead to some confusion among Truckee drivers.

The old mantra “change your oil every three months or three thousand miles, whichever comes first” once applied to every vehicle in your garage. Time and miles take their toll on motor oil. But now, you could have a different oil change recommendation for every car or truck you own.

Truckee people are like everybody else, they have a tendency to put off all the oil changes to the schedule of the vehicle with the longest interval. Of course, that can lead to problems. How to Know When to Change Your Oil At The Auto and Tire DoctorFor example, recently four of the world’s largest auto manufacturers shortened the published intervals for several of their engines. They originally published intervals that extended out to a much as 8,000 miles.

In real world Truckee driving, the oil started to sludge up before the recommended change interval. Oil sludge is a thick jelly-like substance. Quite literally petroleum jelly – like Vaseline. This goop was clogging Subaru or 4 wheel drive small engine passages so the oil wouldn’t flow to some parts of the engine. This resulted in engine damage. We see it from time to time at The Auto and Tire Doctor.

The manufacturers began to offer an extended warranty to cover sludge damage. But there was a catch: the vehicle owner had to follow a new, lower service interval, and provide proof of oil changes in order to make a warranty claim.

So here’s the problem. With longer oil change intervals, it’s extremely important to follow them closely. Back in the day of 3 months or 3,000 miles, if you went an extra month or an extra thousand miles, your oil was still fresh enough that it didn’t have time to build up much sludge.

But if your recommended interval is 6,500 miles and you go over another thousand, you’re getting into heavy sludge territory. You absolutely need to follow mileage intervals very closely. And don’t forget your severe service schedule. If you do a lot of stop and go driving in California, short trips, drive in dusty or polluted Truckee conditions, hot or cold weather, or haul heavy loads, you’re driving in severe service conditions. Your The Auto and Tire Doctor advisor can help you evaluate which schedule to follow.

So check your Subaru or 4 wheel drive owner’s manual or talk with your Truckee service advisor about where and how you drive. Should you be changing your oil closer to the regular schedule, or the severe service schedule? You need to make the call.

Let me give you an example of this. Some newer Subaru or 4 wheel drives have an oil change indicator. It has a sophisticated computer algorithm that tracks number of cold starts, engine temperature, RPMs, mileage, and many more variables to come up with a recommendation for when to change the oil.

Depending on driving conditions, the indicator in one test vehicle came on at anywhere from 2,500 miles to almost 7,000 miles. It’s typically just over 4,000 miles. What this tells us is that sometimes, we’re driving easy miles that are easy on the Subaru or 4 wheel drive – like a long road trip. Sometimes, we’re driving hard California miles – like towing a trailer or a lot of around town driving. But, usually, it’s a combination of both.

Once again, it’s up to you to make the call as to when to change your oil at The Auto and Tire Doctor to protect your Subaru or 4 wheel drive engine. Another place where California drivers can go wrong is with the type of oil they use. More and more new cars are coming to Truckee owners filled with synthetic oil. Without going into a lot of detail right now, let’s just say that synthetic oil lasts longer and is very resistant to oil sludge.

But it also costs quite a bit more, so some Truckee people are tempted to use conventional oil for their oil changes. Now, it’s always best to use the oil recommended by your manufacturer. Check your owner’s manual see if a conventional oil alternative is allowed.

But getting back to the problem, if your Subaru or 4 wheel drive came from the factory with synthetic oil, the recommended oil change interval is for synthetic oil. If you use conventional oil, you can’t use the synthetic interval. You need to shorten it.

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