My cars got revo fitted and the setting on my sps2 module says to use 98RON fuel, the only fuel at 98RON is optimax. Its all thats been in my tank for as long as i can remember, not done any harm(touch wood).
As for miles on a tank, I could'nt tell you, cant say i keep an eye on that, although i may just out of curiosity now.
What sort of prices do you lot pay for optimax, it seems to vary, there are 2 shell garages by me the 1 is 87.9 and the other one is 95.9, quite a big difference. Where is the cheapest optimax in the UK?