I always like to know just what I can get away with if I really have to so ran the first tank out of the GTI till the trip meter was saying 5 km to go and got nearly 52 litres in till the first cut off on fast fill. Managed to get 54 in it on half flow without overflowing it. Yes I know I'm not supposed to go past the fast fill cut off.

Would I be correct in assuming when VW says its a 55 litre tank I can actually use 55 litres? The STi claimed 60 litres but by 54 you were walking.

Once I hit 0 km and the bottom of the gauge is it pretty much game over or is there a 20km or so idiots margin???

Not planing on a regular thing but its nice to know exactly what you can do if you get caught out in the country.