Synthetic Oil Myths and F A Q

There are a lot of myths, half truths, and disinformation about all synthetic motor oils. My goal with this page is to outline these myths, half truths, and disinformation in order to expel them for what they are. I will continually update this page when I come across more of these these synthetic oil myths, half truths, and disinformation.

Myth: You can't switch from dino oil to synthetic and back again!

Fact: "can I switch back to dino oil after using synthetic?" This is by far one of the most frequent questions I am asked by customers.. The answer to this question is a resounding YES! You can switch back and fourth between dino and synthetic oils as much as you like, and you can even mix AMSOIL with dino oil, but by doing so you will not be able to extend your oil change intervals.

Myth: AMSOIL Synthetic motor oil will cause your engine to leak oil!

Fact: If the question above is the most frequent question I get, this one come in a close second. This myth actually originates from the early days of synthetic motor oil in which the synthetic motor oil lacked the additives to cause the seal swell and protect the seals. Amsoil contains additives which keep the seals pliable and prevents leaking. I made the switch to Amsoil Synthetic when my Durango reached 95k miles, and I have had no problems with oil leaks. This is an old myth that continues to rear it's ugly head, but we will continue to expose it for the myth it is.

Myth: AMSOIL or Extended Drain Intervals will Void My Warranty.

A. Oh ya, I get this one a lot, and I think I will use a quote from SEMA to show this disinformation for what it is:

"According to the Specialty Equipment Marketing Association (SEMA), the trade organization of the automotive aftermarket, U.S. federal law “sets forth requirements for warranties and contains a number of provisions to prevent vehicle manufacturers, dealers, and others from unjustly denying warranty coverage.” When it comes to aftermarket parts, such as the bolt-on performance components described in this and following chapters, SEMA notes “the spirit of the law is that warranty coverage cannot be denied simply because such [aftermarket] parts are present on the vehicle. The warranty coverage can be denied only if the aftermarket part caused the malfunction or damage for which warranty coverage is sought.”

In other words, the only way the company can void a warranty is if they can prove that the oil (or any aftermarket part) caused the malfunction. But this is such an important issue, I figured I will also share AMSOIL's position as well (I know it's lengthy, but I feel this is an important issue that needs to be covered):

"If you are interested in using AMSOIL motor oil, but concerned that using a synthetic oil or extending your oil drain interval will void his warranty, you have no need for concern. Congress in 1975 enacted the federal Magnuson-Moss Act to regulate written consumer product warranties. An examination of the law reveals warranties remain intact when AMSOIL Synthetic Lubricants are used.

The law was meant to give consumers detailed information about warranty coverage before they buy.

Congress charged the Federal Trade Commission with creation of the specifics of the law.

The FTC set down three rules under the Act: the Disclosure Rule, the Pre-Sale Availability Rule and the Dispute Resolution Rule.

Those rules require warrantors to title their written warranty as either full or limited, provide a single, clear and easy-to-read document that spells out certain information about coverage and ensure that warranties are available where the products are sold so that consumers can read them before buying.

In passing the Act, Congress meant to give consumers access to warranty information, let consumers comparison shop for warranties, encourage warranty competition and promote timely and complete performance of warranty obligations.

While the Magnuson-Moss Act does not require manufacturers to provide a written warranty, it provides specific rules when one is provided. Among those provisions, FTC regulations state: (c) No warrantor of a consumer product may condition his written or implied warranty of such product on the consumers using, in connection with such product, any article or service (other than article or service provided without charge under the terms of the warranty) which is identified by brand, trade, or corporate name; except that the prohibition of this subsection may be waived by the Commission if (1) the warrantor satisfies the Commission that the warranted product will function properly only if the article or service so identified is used in connection with the warranted product, and (2) the Commission finds that such a waiver is in the public interest. (15 U.S.C.2302(C))

That means your warranty stands when you use AMSOIL Synthetic Lubricants.

Vehicle manufacturers recommend lubricants according to their viscosity grade and service classification. Any oil, whether its conventional petroleum motor oil or synthetic, meeting the correct viscosity grade, 5W-30 for example, and the current API and ILSAC North American service classifications may be used without affecting warranty coverage. AMSOIL motor oils are recommended for use in applications requiring these specifications.

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.

Synthetic motor oil was introduced to the automotive public in 1972 by AMSOIL, INC., with the world's first API rated synthetic motor oil specially formulated for long service and superior performance and protection to that of conventional oils.

Nearly 30 years ago, AMSOIL synthetics represented a vision of the future and technology ahead of their time. Since then, every major engine oil manufacturer has introduced synthetic oils of their own. To be sure, many original equipment manufacturers would like you to believe you can only use their products. However, it's a violation of the consumer protections set forth in the Magnuson-Moss Act, unless they're willing to provide you those products free of charge.

AMSOIL offers a warranty that covers the cost of repair or replacement of a proven mechanically sound engine damaged as a result of using AMSOIL synthetic motor oil. However, it has never happened. Thirty years of experience proves AMSOIL can be installed in any vehicle with complete confidence.

AMSOIL further backs its products with action when a Dealer or customer reports being told their warranty is voided if they use synthetics.

If you have heard from any member of a business that the use of AMSOIL Motor Oil or the practice of extending drain intervals will void warranties, send AMSOIL all the details including the name of the business, business owner or manager and the individual making the claims, in a signed and dated letter. Send the letter to the Technical Services Department at corporate headquarters and an AMSOIL representative will send them a letter explaining the facts.

Access to the complete Magnuson-Moss Act is available on the Internet by key words Magnuson-Moss Act or Federal Trade Commission."

Myth: You Should Change Your Oil Every 3k Miles Because Carbon Will Build Up Due to Blow by

Truth: Carbon is not a big problem when it comes to oil change intervals. But don't take my word for it, here is a statement by the guys who actually test used oils. "Carbon isn't usually a big problem.  Most of the time it's big enough the oil filter catches it." Ryan Stark Blackstone Labs

The fact is, a good oil filter will catch and filter out any carbon that may enter the engine. A good oil such as AMSOIL will suspend contaminants and allow the filter to catch them.

Myth: You can't go 25k miles between oil changes.

Truth: Of course you can, even on a dino oil, but I wouldn't reccommend it! AMSOIL is specifically designed for extended drain intervals, with extra additives to control foaming, acidity, thermal breakdown, etc.

Stay tuned, more to come.