We ran that stuff in our late model small block, 8000+ rpm and we found oil psi spikes, drops, very uneven stuff. Our pan holds a LOT of oil, 10 qt with a kick out in it, we found that stuff foammed up terribly, we ran VR1 race oil with 2 qts of lucas. They told up the ratio we were using. Well we tried to just run brad penn, no more issues...
