Thread: Engine Flush Additive. Yay or Nay

Dump a quart of transmission fluid in if you want to flush and clean the engine. ATF is a similar viscosity to engine oil, so you don't have to worry about thinning the oil, and it is also loaded in detergents, so it will clean everything up good.

Originally Posted by stealthee

Dump a quart of transmission fluid in if you want to flush and clean the engine. ATF is a similar viscosity to engine oil, so you don't have to worry about thinning the oil, and it is also loaded in detergents, so it will clean everything up good.

Word. That's exactly what I use.