If you have a flat tappet cam, it better have Zn[S2P(OR)2]2 or zinc dialkyldithiophosphates, also known as ZDDP. I use Valvoline Racing 20/50 Motor Oil.
Do not use a synthetic or a blend with a flat tappet cam without Zinc protection. If you do, get it out now. If the engine has a roller cam and rocker (both), the synthetic is fine without Zinc protection.
Best of luck
Cory
Do not use a synthetic or a blend with a flat tappet cam without Zinc protection. If you do, get it out now. If the engine has a roller cam and rocker (both), the synthetic is fine without Zinc protection.
Best of luck
Cory