Zinc oil supplement
Whatever oil you use be careful to NOT use one with high detergents.
Why?
The zinc may cling to the parts but the detergent will then strip it off. I used some oil that did this....
10 w 30, a great oil weight for many engines.
Synthetic? Looking good!
Seems great until you see that it is the HIGHEST detergent level on the market today.
API SN/SM/SL.....
Yeah, throw zinc in the mix but scrub it right back off with high detergents. BRILLIANT!