back in the day, we ran what ever was supplied us by small sponsers, no problems w/ any of them. a lot of it depends on how your engine is built.
on another note, a freind has a very fast vega w/sbc, saw him break a motor w/ the high dollar kendall in it, he didn`t think it was funny when I told him the high dollar oil he was bragging about didn`t look any better out there on the ground underneath the engine than any other oil!--felt sorry for him tho, but he`s an excellant mech., wasn`t too big a deal for him.-------bob:oops::oops: