Quote: I run Shell 15w-40 Rotella diesel oil. You need the Zinc for your cam. Most passenger car oil had the zinc reduced to a potentially dangerous level.
I go to farm and fleet and purchase two cases one for my Diesel and the other for the flat tappet hotrod! The valve train psi in a Diesel engine still require the missing zinc from automotive engine, but if you have a roller cam that changes things a bit
I go to farm and fleet and purchase two cases one for my Diesel and the other for the flat tappet hotrod! The valve train psi in a Diesel engine still require the missing zinc from automotive engine, but if you have a roller cam that changes things a bit 
