I am getting pretty much 50 miles to a £10 consistently in the passed 4 weeks I've owned my newage STi.

 

Miles per gallon? Its more like gallons per mile

Not even going to imagine what my fuel consumption will be when my build is finished.
960cc Injectors, two full pumps, 2.5L and a garrett GT35R turbo

On the BP ultimate thing I actually got less knock when I used esso 95 fuel than i did with the one and only time I've used BP ultimate.

 

I get to 40 ish and then put another nigel in.

 

it should be gpm, not mpg! thirsty but worth it