i was at the local hot rod club monthly meeting ( a few years back), and the was a 2 hour discussion on zddp ( the zinc additive they removed ). what i learned was that: a; the additive is designed to make oil cling to "high shear areas" like lifter and cam lobe surfaces. b; it was removed to make catalytic converters last 100,000 miles as directed by the u.s. gov't.c; roller lifters is the instant cure for modern oil.
that being said, if your valve spring are super high pressure, you're going to have lobe failures, and mighty quick. i don't know what the exact number is. so if you got a stock 1200, you're very unlikely to have grief. i've got bugpack high rev springs in my engine and have never had grief, but i also have scat lifters with that oiling hole, a possible cure???. i've also broken in new v-8s with stocks springs and never had grief either.
so if you have the option of roller lifters, you're crazy not to use them. and if not, get some additive
