What makes our flush different and when is the best time to use it?
First, I'd like to clear a couple myths I hear customers ask about often. I'm often asked if once you switch to synthetic you shouldn't switch back. In 20 years I have never seen or heard any reason for this and as for AMSOIL, these products are designed to be 100% compatible and do exactly what your engine would expect them to do. The 2nd myth we hear often is "You have to use your flush (or any) before switching to AMSOIL". Again - totally not true. This myth may have come from the fact that there are  ester based synthetics used in racing which are not compatible, but AMSOIL does not use those formulations in their automotive line of products. AMSOIL motor oils are totally compatible with others.

The function of the flush is to complement the oil. The idea is to neutralize acids and suspend deposits so the fresh oil's additive packages will last longer. In some cases the engine may have preexisting issues caused by long idling or temperature increases so the flush is your first step toward better efficiency.

Engines today are more prone to deposits due increased heat as a result of manufacturers trying to squeeze out more efficiency. We are also seeing increases of fuel dilution issues especially on diesel motors. You would think it's just the opposite but every couple of years engine requirements surpass engine oil technology. New challenges are presented to lubricant manufacturers but AMSOIL has these worked out and tested years ahead.

Detergents in your new oil may not be able to handle the deposits already in the block as well as glazing on clutch plates in your transmission. Yes - because this is a detergent based product, it's perfect as a transmission flush as well. You don't have to worry about effects of residual product being left behind.
Yours truly just bought a used Volvo like the one pictured and while only at 25,000 miles, it's a turbo so I don't want to take any chances of the lines coking. I run my AMSOIL (AZO 0W-30) products to their full intervals so this gives me the added benefit of the doubt.

Please read the AMSOIL Flush technical data sheet for more information.

API Reveals Nearly 20 Percent of

The problems aren't just limited to

smaller oil distributors. Bulk motor oil

testing performed by the American

Petroleum Institute (API) indicates many

motorists may be receiving substandard

motor oil when they drop their vehicles

off for an oil change. According to the

API, it purchased and tested more than

1,000 samples from bulk motor oil tanks

throughout North America over the past

five years, and nearly 20 percent failed

PQIA Issues Advisory for Valvoline