Hi i'm new here and need advice for what type of oil i should use and what brands. I have a 1990 Cavalier Z24 and its a modifed non-turbo engine. I just rebuilt it at 96,966. The engine looked dirtier on the outside more than it did on the inside.LOL Anyways i broke in the new cam with dino and it was okay and then put synthetic blend 5w30 in for a couple OCIs.i've noticed a couple leaks already somewhere in a tight spot.Its too early to AutoRX treat it so Do you guys think i should try ad thicker a blend and run extra additives in there or go back to dino?