If your cam and lifters are new, I would taper off the zddp additives a little at a time. Each oil change I would add some, don't just quit after the break-in run, its not a coat it once and forget type of additive. It takes some time to really "wear in" the cam and lifters. I know its only a stock motor with very little lift and spring pressure, but it still needs some additive. I would consider 1000 to 2000 miles broke in. Comp Cams sells a additive that works really good, I tell all my motor customers to run at least half a bottle in every oil change, its just cheap insurance.
Joe
