AMSOIL, The First In Synthetics

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Answers to Common Questions Regarding AMSOIL Synthetic Motor Oils

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You Saw What? A compilation of various reports, label reading, unsubstantiated tests, etc. on various "oil additives."

What Are Synthetic Lubricants?

Why Are AMSOIL Synthetic Lubricants Best?

I just bought a new car, and I'd like to try AMSOIL motor oil. Could using AMSOIL void my new car warranty?

I bought a new car a year ago, and I've been running petroleum oil in it ever since. Could switching to AMSOIL now cause mechanical problems?

My car is older and has over 100,000 miles of petroleum oil use. Can I change to AMSOIL?

What's the difference between conventional petroleum motor oils and synthetic motor oils?

I was always told to change my oil every 3,000 miles if I wanted to properly maintain my vehicle. How is it possible to drive 7,500 or even 25,000 to 35,000 miles without an oil change using AMSOIL?

AMSOIL costs more than my regular oil does. How can I justify paying this higher cost?

Can I mix AMSOIL with my petroleum oil?

Should oil additives or aftermarket products be added to AMSOIL motor oils?

What benefits can people expect using AMSOIL motor oils?


I just bought a new car, and I'd like to try AMSOIL motor oil. Could using AMSOIL void my new car warranty?
Absolutely not. Vehicle manufacturers recommend using motor oils meeting certain viscosity grades and American Petroleum Institute service requirements. Whether the motor oil is petroleum based or synthetic will not affect warranty coverage. The manufacturer is required to cover all equipment failures it would normally cover as long as the oil meets the requirements and was not the cause of the failure. AMSOIL exceeds these requirements and has never been deemed the cause of an engine's failure. Even so, AMSOIL has its own limited warranty, protecting you even further. In addition, the federal mandated Magnuson-Moss Act states that a manufacturer may not require the use of a specific brand of aftermarket product unless it's provided free of charge.

*Note: If a car dealership, service center or other business states that using AMSOIL motor oil will void your new car warranty, ask for that statement in writing and send it to AMSOIL Technical Services. If the business won't provide the statement in writing send AMSOIL Technical Services a letter identifying who made the statement, the name and location of the business and what the specific statement was. AMSOIL will then send a letter to the business informing them that their position is inaccurate, and, in fact, violeates existing law. Your name will be held in confidence.

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I bought a new car a year ago, and I've been running petroleum oil in it ever since. Could switching to AMSOIL now cause mechanical problems?
Switching from petroleum oil to AMSOIL is perfectly safe.

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My car is older and has over 100,000 miles of petroleum oil use. Can I change to AMSOIL?
You can use AMSOIL in any "Sound" engine, that is, the engine is not using, burning or leaking an excessive quantity of oil. Additionally, AMSOIL will not damage any seals; however, if it is an older engine with tired or worn out seals being held together by varnish or sludge, AMSOIL will clean the varnish and it may reveal the seal problem you may not have known about.

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What's the difference between conventional petroleum motor oils and synthetic motor oils?
Conventional petroleum oils are refined from crude oil which is pumped rom within the earth. The refining process, however, does not remove many of the impurities inherent in the crude oil. These impurities detract from the lubricating ability of the oil and contribute to deposit, sludge and varnish formation. AMSOIL synthetic motor oils are constructed in the laboratory and contain no impurities. AMSOIL synthetic motor oils have uniform molecular structures and are designed for specific lubricating applications. They are not affected by the high temperatures or demanding operating conditions of modern engines.

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I was always told to change my oil every 3,000 miles if I wanted to properly maintain my vehicle. How is it possible to drive 7,500 or even 25,000 to 35,000 miles without an oil change using AMSOIL?
AMSOIL synthetic motor oils are guaranteed to run longer: XL oils for 6-months/7,500 miles; Traditional oils up to 25,000 miles, Series 2000 up to 35,000 miles - or one year (whichever comes first) - in mechanically sound engines, providing, of course, the oil is kept free of contaminants by changing the oil filter according to the manufacturer's recommendation or, when using an AMSOIL oil filter, changing the filter at six months or 12,500 miles, whichever comes first. AMSOIL coined the phrase "extended drain interval" and it's been validated by 30 years of industry testing and by tens of thousands of motorists and millions of over-the-road miles.
AMSOIL synthetic motor oils provide extended drain performance because they don't break down in heat like conventional petroleum oils do. AMSOIL motor oils don't form performance-robbing deposits, and don't volatize (burn off), which alters viscosity and increases oil consumption. Finally, AMSOIL's superior additive package, a key element in the oil's ability to function, holds up under engine stresses, remaining servicable for the full 25,000 to 35,000 miles.

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AMSOIL costs more than my regular oil does. How can I justify paying this higher cost?
AMSOIL just might be the Highest Priced, Lowest Cost motor oil you buy.
AMSOIL synthetic motor oils are more expensive off the shelf tan most petroleum oils, but comparing AMSOIL and other motor oils is like comparing apples and oranges. AMSOIL's performance so far exceeds that of conventional motor oils, it's really a differnet class of product. AMSOIL is a premium product that rightfully commands a premium price.
Like anything of real value, however, the tgrue consumer cost doesn't end with the purchase price. AMSOIL motor oils are extremely cost effective compared to conventional 3,000-mile drain interval oils in savings realized in fuel economy, reduced repairs, fewer oil changes, reduced downtime, reduced maintenance and extended engine life.

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Can I mix AMSOIL with my petroleum oil?
Yes, you can. There is no danger in mixing AMSOIL with another brand. However, a conventional petroleum oil will detract from the superior performance of AMSOIL.

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Should oil additives or aftermarket products be added to AMSOIL motor oils?
No, you don't need them. AMSOIL motor oils are formulated under the strictest quality control standards to provide superior lubrication performance. Additives cost money and only detract from the quality of AMSOIL motor oils.

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What benefits can people expect using AMSOIL motor oils?
AMSOIL synthetic motor oils have demonstrated improved performance and fuel economy, reduced oil consumption, lower repair costs, easier cold-temperature starts, increased engine life and reduced emissions.

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