£50 to 240 miles. Odd way to measure your MPG.
Since owning mine I've averages a shade under 20 mpg. However my daily commute is under one mile there, and the same back (obviously).
The car doesn't get off cold in either direction and this murders the economy.
The recent trip to the Nurnburgring averaged a little over 22mpg. This involved pootling down to Dover, then tickeling along a lot of unrestricted autobhans

with a mid section economically dribbling around the ring

.
The conclusion you can draw form this is that 27 to the gallon is easily achievable on a rational 100 mile 75 mph run.
How you achieve a decent overall average is beyond me. The noise and drama and sheer fun, do invite a somewhat enthusiastic progress