....one thing I did notice on both my WRX and Forester is that when I fill up shortly after the light illuminates, I will always have a little over two gallons left in the tank (takes a little over 13.5 gals to fill). IIRC the manual says ~2.3? The most I pushed my luck was about 40 miles past although I don't recall what it took to fill it up that time around. I always figure I have at least 30 miles from the time the light goes on. ....anything past that and I'm tempting fate.