Re: old chrysler 35 hp
Would synthetic oil be compatible with your vintage SeaKing? My 1969 Chrysler 20 HP is using TCWIII just now, before, what my father bought from the dealer, I do not think there were TCW oils then, just straight SAE 30 motor oil. I don't think it will make a difference except for the burnt smell of hard earned cash that could be spent in PFD's!