Dude, there's something called the FILTER. You heard of it? They'll have a filter for the fuel as well as the oil filter u guys always change for the engine oil.
On city driving, i'll get about 420kms without touching the bottom line so i guess it can go 450 before it totally gets empty.
Mods: 3" full exhaust, Pod, SSQV, set my SBC on 8psi & occasionally 11psi