That's around 20 miles a gallon, which sound right.
I would guess you are getting about 60 miles per 4 gallons. That's based on 15 mpg which is the lower of the estimates.
its sounding about right, but dont make a habit of running around on almost nothing,..., it's bad for it
The fuel float in the tank is bad.
i can get about 80 miles out of 4 gallons, is that about right? it seems like the miles before empty drops pretty fast
