I've been trying to calculate how much gas mileage is available when the amber low fuel indicator comes on. I generally get between 330-350 miles on a full tank and the low fuel indicator pretty much comes on when I'm down to 2 bars. I'm trying to guess just how much I can continue driving at that point. A full tank has 20 bars and I think I usually get about 15-17 miles per bar, but that's not always consistent or reliable. On a full tank I can get over 32 miles on the first bar alone. I just want to have a reasonably safe idea how much farther I can keep going when it comes on before filling up but it always makes me nervous so I just find the nearest gas station when it comes on because I'm afraid of running out.