if you drive say 200 miles on the tank and THINK you have a 25gal. tank and fill your truck but dont think to look at how many gal. you put in (i know some people that go by what their tank is not what they put in) then it throws it off
but yes if you do it how you should and go by what you put in and miles drove on THAT amount it wouldnt change with the size of tank
but the way i took it, he drove a certin amount of miles and took a guess at how many gallons he used so if he thought the tank was bigger it would make it lower
2004 EDGE "of insanity"
4.0 SOHC 4X4
4.10 Limited Slip rear
32" BFG All Terrains