Problem2420
I'm Awesome
well guys my firebird has a 305 with bad valve seals a 205k miles on it, for the mean time i was wondering what weight and viscosity oil is best for the smoking i was reading 20-50w but would that be okay for california climate. i was also reading marvel mistery oil would help. i know htere are some engine experts on here that could help alot of us high milage people out. lol