i have a mk1 focus RS and currently run in on shells vpower fuel (which at the moment is already £1.28 ish) but with petrol due to go up again, i was wondering is it worth all that extra money? would normal fuel be fine,

so say you should always use to high performance fuel on cars like these others say it dosent matter as its not that higher performance car.

i just duno! car is adveragin 17mpg at the mo