I believe the light comes on at 3 gallons. At least that's what I calculated when I ran out of gas.
I don't know if those above are actually calculating MPG or just going off the dash numbers... I know the best I've gotten in mine was around 220-230 miles which is just under 13 MPG.
I could probably get better, but I find it near impossible to set the cruise under 75 MPH. 55-65 I get around 18-22 on a flat road (on the dash) and over 70 on a flat road it displays between 12 and 13 if I recall, so it actually isn't that inaccurate.
--
Build Thread - Adventures of Fiona - https://wayalife.com/showthread.php?t=47407