[GSP7]

Who's running one of the zddp (zinc/phosphorus) additives in your oil for your older classic rebuilt flat tappet(lifter) cam engines

Since they are taking zinc/phosphorus out of all oils because it wreaks catalytic converters etc

Ive been doing alittle research, the brands I've found are :

ZPPD plus http://zddplus.com/

ZPPD max http://www.zddpmaxx.com/

Lucas http://www.jegs.com/i/Lucas-Oil/639/...FVBlfgodX6oDbA