Im stumped, It's missing and ticking.

API SM rated oils now have very minimal amounts of ZDDP, ostensibly to reduce emisisons and protect catalytic conveters. That could spell disaster for valvetrains running heavier springs/pressures. May be OK for stock stuff, but I wouldn't use it. Rollers may be OK, but I'd stick with the HDEO diesel oils from here on out. Some of the oil treatments (STP and whatnot) are good for beefnig up the ZDDP levels.