So I have a 1955 3100 with a 235. Recently I have been reading about ZDDP additive and its use with flat tappet lifters/cam. My question is since the 235 had solid lifters with a manual transmission (which is what I have) would the ZDDP additive be useful for this engine? The one I found is the Valvoline vr1 sae 30 oil. Or does it not even matter what oil I use. Thanks
Tate

Last edited by comicaltatertot; 03/18/15 09:44 PM.