Quote:
Originally Posted by patrickt
If you have a SFT cam that has been nicely broken in, has gentle ramps, reasonable lift and springs that aren't too heavy then you might be right. The only way you would know for sure is to swap out your healthy ZDDP oil for the newer zincless oil and then waited to see if you ate a lobe or not. Remember, the reason ZDDP was removed from oil is that it damages the catalytic converter. If you don't have a CC on your car there is no reason to avoid ZDDP, which is an absolutely wonderful anti-wear agent.  |
ZDDP is a wonderful anti-wear agent, but it's worth noting other anti-wear agents are used by the oil industry as ZDDP is reduced. API's tests still include flat tappet testing for all oils, including current versions (e.g. SM, SN and SP).
BTW, I've been running 5W30 full
synthetic in a HFT engine for 7 years with no ill effects (so far). Dual springs with dampers and 300 lbs open spring pressure. That's not to say someone with a SFT cam and 500 lb spring pressures would have the same experience.