dan0617 wrote:
I have an '89 with a 383 and a flat tappet cam. I run 10W40 Valvoline or Mobil or Castrol, synthetic blended usually, whichever I can find on sale. I then add a bottle of Comp Cams Break-In Oil, which I get from Summit Racing. It has large amounts of Zinc.

Haven't had any problems yet, and I have done everything else against the grain with this cam. (It's been installed in 3 different blocks now, and has been run with 3 different sets of lifters!)