Homebrew

Is optimax better than regular unleaded when used in the z? I have been told that it is better if you are running at higher boost levels (stops pinking) . I dont mind spending the extra if it will benefit the car. Any ideas? Ste.

I am also after a competant wheel alignment place, have tried some of the local garage but they cant seem to do it on the rear wheels. My Z is pulling to the left. Im in Telford Shropshire.

Thanks everyone for the advice. I think I will use either the 10/60 or 10/40 next time I have a oil change.

Does anyone know what type of oil is the best for the Z? I have 5L of Comma XTeck 5W-30 semi synthetic oil, will this do the job ok? Thanks. Ste.