iv just finished bolting on a turbo to my calais , just want to know witch is the best oil for the motor now ect (price doesnt matter). need to know asap as ill be filling it up tomorrow after work
If you've been running mineral oils for the entire motors life then keep putting that in. A great quality-for-money oil is Penrite hpr30. Bit on the thick side which is good for oldish rb30s.
Ill vouch for HPR30, the old girl always ran well with that in it.
My new tuner recommends using Castrol Sports Edge Titanium or something like that (new motor though, so might not suit your application)
Always heard about Royal Purple, never had the opportunity to try it, guess its whats accessible to you at the time.