Originally Posted by
wetamup2k3g
8G's have a 16.8 gal tank, but I struggle to put 14 gallons in even if I drive for a whole day with my gas light on and my needle hanging past the last tick. I can get about 300 miles reliably out of those 14 gallons. Still, 220 at half is good, usually I know I'm gonna get to 300 to the tank if I'm around 170-180 miles at the half-tank mark, so 220 is good. I usually only do highway miles. Considering the relative inefficiency of the 6G72, 25mpg is great!
Oh, and what dmdvzla said is soooo true, the second half of the tank in every car I've ever been in flies compared to the first half. At Lincoln Tech, my fuels teacher explained it as the float arm gets trapped between the top of its travel and the fuel BEFORE you fill it all the way up, so the float won't begin to move until you use some of the gas to the point where the float is actually floating on the fuel again. I know my needle won't move from the full position until around 90 miles after fill up, it was like 110 miles in my 4-cyl. Now my wife's minivan (and her truck before it) didn't exhibit that characteristic, but my old van and my parents' Ford Focus did, and my wife's old Cavalier did too.