Quote:

I add 1 pint of zinc additive at every oil change on my cars with flat tappet cams and I use Valvoline VR-1. It is cheap insurance.



Wish I'da done this w/ my newly rebuilt hemi with solid flat tappet
cam. I used only VR1 without the Comp Cam's break in additive & the repop fuel pump pushrod took out the cam lobe.
I use the Comp additive in my 383 & no problems so far.
Lie he says, its cheap insurance.