|
Re: 1972 GMC oil
I have the original 402 in my C20 with just under 38k original miles. I run 5w30 Mobil 1. Oil pressure is the exact same as with 20w50 Valvoline VR1, but gas mileage improved and it runs smoother.
__________________
1971 Chevy Custom Camper/20, Hugger Orange with White Top
31,000 original miles (when purchased), 402, TH400, PS, PB, AC
As of May 2017 it now has a turbo LS in it! (Still looks stock though)
|