I have a 90 4.0 auto and it takes roughly 65 litres to fill, i only get 400km to a tank. 1 km = .62 miles so that means im only getting like 250 miles to a tank? What the .... could be causing this. I got so much new parts and scans its crazy, only thing i havent replaced is exhaust, injectors, and a fuel pump. Suggestions? Could a bunged up muffler do this? Oh yeah i got new at 235/75 15s no lift yet, and no mods(cause there is none for a 90 that i can find) i maintain it very very well.