all depends! if i boot it i get about 180 miles to the tank if i take my time i can get 550miles out of a tank

also with me it depends on where i get the fuel from tesco's seems to burn really quickly whereas shell seems to last forever and not as much black smoke
p.s our mk6 350 camper does about 800 miles to the tank

i think because its been chipped it affects it quite a bit