55 litres and 350miles a tank - crikey !!
I've only just got my new valver and it's probably running rich with the ignition timing setup wrong.
I can only get 40 - 45 litres in her running well in to the red - that only lasts 200 - 250 miles, but that's with a few squirts ofcourse

Usually a GTI driving sensibly should do around 300 to a tank I've seen from previous threads.
According to the MFA I'm getting 20 - 25 mpg average though ... so 12 gallon tank (40/45 litres) should be around 240 miles upwards.
Does anyone know the size of a valver tank ??