Originally Posted by russ67chevelle

gmc, im agreeing with you.maybe all oils that are high in zinc and phos. keep "slippery" when contaminated...dunno...i was trying to make the point that the reason i use brad penn is cause when im using nitrous my oil smells like fuel, but it remains "slippery"

i didnt mean to pick at a nerve,sorry if i was unclear of why motors that are subjected to contaminents (fuel) would appreciate brad penn oil.if it stays "slippery" when contaminated because of the zinc and phos., then i learned somethin new....

just with roller cam motors dont need the zinc and phos. to the same level like flat tappet cams do. i know the additives also help other valvetrain along with all moving parts in friction.im sure u know this again,but others might not