Below is a list of questions frequently asked by those interested in switching to Amsoil Synthetic Lubricants. If you have other questions, please feel free to contact me for a prompt reply.

Q: Why should I switch to AMSOIL?
Q: Why does AMSOIL cost so much?
Q: How long has AMSOIL been around?
Q: How do I change to AMSOIL?
Q: Will using AMSOIL void my new car warranty?
Q: Why are AMSOIL synthetic motor oils good for extended drain intervals?
Q: Does extending oil drain intervals void new car warranties?
Q: Will my oil pressure or idle rpm change when I switch to AMSOIL?
Q: Should I use oil additives with AMSOIL?
Q: Where can I find AMSOIL products?


You should only switch to AMSOIL if you want better equipment performance or longer equipment life than you're getting with your current products.

The performance advantages you'll get with AMSOIL include:

  • Dependable cold weather starting
  • Reduced likelihood of engine overheating
  • Better gas mileage
  • More power, better throttle response
  • Cleaner exhaust
  • Longer intervals between oil drains

The longevity advantages you'll get with AMSOIL include:

  • A cleaner engine
  • Less engine wear

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Top quality products always cost more than lesser quality products do. But you get what you pay for. With AMSOIL, you get state-of-the-art research and development and the best materials blended under the strictest quality control regime in the industry. Every attention is given to producing the finest motor oil in the world. With that finest motor oil money can buy, you, the consumer, get the best engine protection and motor vehicle performance, bar none. Sure, AMSOIL costs more upfront, but in the long run, it pays for itself through better gas mileage, fewer repairs and longer engine life -- and fewer oil changes if you choose to extend your oil drain intervals.

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AMSOIL was founded in 1972 with the introduction of the first 100 percent synthetic motor oil to gain an American Petroleum Institute performance rating and has led the industry ever since in the development of synthetic lubricants.

Many conventional oil companies just started offering synthetic and synthetic-blend oils within the past six years and did so to cash in on a lucrative market. They simply don't have the years of experience and commitment to the development of synthetic lubricant technology AMSOIL has.

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Exactly the same way you'd change your oil if you continued to use the same brand: drain out the old and add the new.

If you're switching a high-mileage vehicle to AMSOIL, you may wish to clean the engine with AMSOIL Engine Flush before installing the new oil. Dirty engines appear to "consume" AMSOIL at a higher rate than they consumed oil before. Actually, the AMSOIL is cleaning the engine and the volume dirty oil trapped in the oil filter is unavailable for oil circulation. Change your oil filter and top up your AMSOIL until the high rate of consumption stops. It'll stop when the engine is clean.

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You can use AMSOIL right from the start. No need to wait for rings to seat or parts to wear in. They'll do that on their own. You should change the AMSOIL at the automaker's recommended drain intervals during the break-in period so the metal particles generated by engine break-in don't cause excessive engine wear.

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No. AMSOIL more than meets the performance specifications set by automakers and all automakers recommend oils based on performance specifications. You may use AMSOIL with complete confidence in new cars under warranty.

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It's all in the formulation. Because AMSOIL is made with synthetic basestocks, it resists thermal and oxidative breakdown, which suits it for extended drain use. AMSOIL pairs top-quality long-life synthetic basestocks with top-quality long-life additives. The fact is, other oil companies don't use the quality additives AMSOIL uses because it simply doesn't pay to pair long-life additives with short-lived conventional basestocks.

Carefully controlled demonstrations conducted jointly between AMSOIL and various car fleets have proven the safety and effectiveness of the 25,000 mile AMSOIL drain interval. In fact, many entities with which AMSOIL has conducted demonstrations have used the oil for significantly longer drain intervals and still been rewarded with lower rates of engine wear than they were with conventional lubricants and conventional oil drain intervals.

Remember -- AMSOIL synthetic lubricants may be used for extended drain intervals, but they don't have to be.

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No. Automakers warrant cars against failures or malfunctions due to manufacturing defects for a period defined by time or mileage. No maintenance practice such as extending drain intervals, can render the warranty null and void.

When a failure or malfunction occurs, the car dealer or a representative of the car maker will examine the failed or malfunctioning part to determine the cause of failure or malfunction. If an indisputable cause-and-effect relationship between the failure and the length of the oil drain intervals cannot be established, then the length of the oil drain intervals is immaterial to the warranty claim and the claim may not be refused on the basis of extended oil drain intervals.

In fact, when AMSOIL Dealers notify AMSOIL INC. that car dealers or other businesses are misinforming their customers about warranty issues surrounding synthetic oils and extended drain intervals, AMSOIL INC. sends the following letter to the car dealer or business:

It has come to our attention that a member of your staff (name) has been informing customers that the use of synthetic motor oil, or the practice of extending oil drain intervals, voids manufacturers' warranties. Neither claim is true. Please review the following facts about synthetic motor oil and put an end to these false statements.
Synthetic motor oil was introduced to the automotive public in 1972 by AMSOIL INC, with its introduction of the world's first API (American Petroleum Institute) rated synthetic motor oil. Since then, every major oil manufacturer has followed AMSOIL's lead and has introduced synthetic motor oils of their own. The performance benefits are indisputable, as evidenced by the fact that every jet engine in the world today uses only synthetic oil.
Vehicle manufacturers recommend lubricant according to their viscosity grade and service classification. Any oil, whether it's conventional petroleum motor oil or synthetic, meeting the correct viscosity grade (5W-30 for example) and the current API SH and ILSAC GF-1 North American service classifications, may be used without affecting warranty coverage. In fact, synthetic oils labeled GF-1 are recommended, but in many applications, actually required.
Furthermore, the practice of extending oil drain intervals does not void warranties. Original equipment manufacturers pay or deny warranty claims based on the findings of failure analysis. To affect the vehicle warranty, the lubricant must be directly responsible for the failure. If the oil didn't cause the problem the warranty cannot be voided, regardless of brand or length of time in use.
Note also that a warranty cannot be voided by verbal instruction only. If voiced, it must be done in writing, stating the specific reason.
The fact is, AMSOIL Synthetic Motor Oils exceed the most demanding worldwide performance standards, including the API SH and ILSAC GF-1 North American standards, and meet all original equipment manufacturer warranty requirements. AMSOIL Synthetic Motor Oils are specifically formulated for long drain service and provide superior performance and protection to that provided by conventional motor oils. AMSOIL Synthetic Motor Oils may be recommended and installed with complete confidence and at no risk to warranty coverage.
We appreciate your attention to this matter and anticipate no further misunderstanding regarding synthetic motor oil.
AMSOIL INC.
Customer Service Division
c.c. legal department
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They might. AMSOIL is a better friction reducer than conventional oils and friction directly affects oil pressure and idle speed. Less friction in the engine will lead to lower oil pressure and more rpms at idle. Since synthetic oil doesn't have to "push" as hard to overcome friction as conventional oil does, the oil pressure drops. The engine still has adequate oil circulation, but like the heart of a person whose blood pressure is lowered through medication, the engine doesn't have to work as hard for the end result.

The change in idle speed is similar to the difference in the feeling of running through water versus running on dry land. You run more slowly in the water because the water resists your movement more than the air does. In the engine, conventional oils slow moving parts because of the higher amount of friction (resistance to movement) in the system. Synthetic oils allow parts to move more quickly because they keep the level of friction lower. Again, the engine doesn't have to work as hard for the end result.

By making work easier for the engine, AMSOIL gives more miles to the gallon, too. Simply set your idle speed down and enjoy the fuel-savings benefit of better friction reduction! If your vehicle is fuel injected and computer controlled, the computer will adjust idle speed accordingly.

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No. AMSOIL is a solo act. Everything your engine needs for lubrication and protection is in the oil. Additives can upset the oil's precise chemistry, or worse, interact with the oil in unpredictable and harmful ways. Save your money ... and your engine. Skip the additives.

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You can get AMSOIL products from any AMSOIL Dealer (chances are there are several in your area). Many retail outlets also carry AMSOIL products, or you can purchase them factory-direct through the AMSOIL Retail Catalog or Online at the Amsoil Store.