20w50 or 10w30?
I have a 408 engine producing about 500 to the flywheel, and 200 shot on top of that (only at the track) running 93 octane, engine temp chills at 190ish, engine is not filled with cement. Right now for break in I have 20w50 synthetic (which was put in by my mechanic), should I switch to 10w30 or keep the 20w50? I also have a roller hydraulic cam, high volume oil pump, and true roller rockers.
Last edited by 84Z; 04-16-2007 at 11:08 AM.