I got 38.6mpg on last year trip to Goodwood FOS, two people plus camping equipment, food and lots of Beer.
the trip was around 500 miles give or take.
Did it the year before in … dare i say it… a Focus ST and got 34mpg.
Just to put this in there, Golf is faster and more economical, also handles better but the exhaust pops of the ST are pretty sweet.
please note that on the drive down i was between 60-70mph and was driving carefully.
Fuel used was Vpower.