oh my Lord. like I said, you wanna run crazy spring pressure with a mech. cam on the street, you take your chances. i don't care what oil you use. want to play it safe? run a roller. that shouldn't even be debated. whats truely amazing is that everything the reputable engine,cam,oil,etc companies say on why zinc is this or that.. there isn't millions of non-roller cam failiors in all kinds of cars everyday. last time I looked, there wasn't.