HI Martybhoy,I use esso for the tesco points and last week I put £20.00 of the supreme fuel in my tank,car seemed to run better and it felt it had a bit more torgue,but I have the uprev and chris at dynamic tuning in EK said this might happen,but this week my engine management light came on,cant seem to find anything wrong but chris will check it out this week.
cheers