Hi there looking for some advice, Ive just been to fill up my 1.8 veccy (Shell Garage V POWER £1.08 litre = £4.75 Gallon.) done 68 miles went back to fill it up to the top as cost me £16.20 = 23.5 pence per mile which comes back at 21 miles to a gallon of V Power Fuel.
Ive just had fitted a twin back box just like the ones fitted on the VXR from the cat back, would this have anything to do with the MPG ?.
Does the twin back box give you any more BHP ?
Any advice please Thanks Andy