Oil
Posted: Sun May 30, 2010 7:10 pm
What brand and weight do you run in your race car???
Shell Helix Ultra, personally. I use Shell Helix in varying grades in any car.
But if you had your engine built, I would ask the builder what they recommend. Larger bearing clearances would normally require thicker oil. Smaller clearances, thinner oil. Also of course how hot your engine gets is another consideration(A SBC turbo more will run hotter than a NA SBC, etc)
Castrol Edge, Helix Ultra, RP, RL, etc..
pretty much any syn oil in general will work. Just grab a good name brand(and filter) & keep an eye on your pressure, until you are confident it will work for you.
I have seen a 585 BBC that can use 5w-30, but another that was built almost identical, but by a different builder use 20w50. Both making 900+HP.