Originally Posted by yellowdotz
ok i'll try filling up once the light turns on and noting the gallons on the pump. then divide the total miles by that number as you said.
Fill it up NOW.
You don't know how full the tank was when you drove off the lot. If it wasn't full, then your calculation will be invalid.
Go to the station now and top it off.
Reset the trip odometer.
Drive it for 200 or 300 miles, and top it off again.
NOW divide the odometer reading by the number of gallons used.
Reset the odometer and do it again.
Or... follow the link in my signature block and create a Fuelly account. You then text your total mileage, price, and gallons used to Fuelly and they track it for you and send a text back with your mileage on that tank.
You don't have to wait for the light to come on... the needle will be very close to or on "E" when that happens... and you'll still have about 3 gallons left.