2001, with 2001 tank. My fuel gauge has 3 positions:
1) Full, lasts about 150 kilometres
2) half - lasts for another 150 kilometres
3) reserve - starts from 250 or 300 kilometres. That part is quite accurate. You can actually see the gauge dropping slowly from low to the empty part.
So I rely on resetting trip counter after filling tank to the brim. Just like on bikes without fuel gauge. I'd rather have oil temp (or even pressure) gauge, than fuel one.