the average MPG's you talk about. are they want your car computer says or are you running the tank down from full and dividing the miles achieved by the capacity of the tank?
My mk4 golf can say 70mpg on the dash, but the most I've managed out of a single tank is 620 miles. tank is 12 gals which I work out to be 52mpg or close enough
also I quietly chuckle at those with england flags on their cars running around with more drag
