Originally Posted by fourgearsavoy
Was a Brad Penn fan until they changed the formula now I only use Joe Gibbs racing oil. They have a nice formula for break in that you can leave in for a few hundred miles to insure a good break in. Then you can replace it with their Hot Rod oil designed for flat tappet cams.

Gus beer


I am now using the Gibbs oil as well. Had my 440 dynoed and that is what the engine builder recommended to me.

BR40 for break in and GR5 afterwards.

I also chose their GL-4 gear oil for m 18 spline trans.

Link

70 Road Runner 383-4 4 speed FJ5 & black guts
70 Charger R/T 440-4 4 speed FJ5 & white guts