its only like £80 difference
Ive done a few motorway trips on a full tank in the GTi and get around 380 normally 300+ out of it thats driving at above the limit only by a bit tho
That's really bad for the car. Any trip that doesn't get the engine up to temperature is bad for the engine, can damage engine bearings, cause head gasket failure, among other things! Driving 1/4 mile every day is really not a good idea.