My green red car got the best average yet at 43.7 mpg driving 358.4 miles. I thought I was going to squeeze an average of 44 mpg out of it this tank, but one day of really heavy stop and go traffic nixed the 44 mpg average. When I filled the tank it took 8.2 gallons of gas, which when you divide 358.4 miles by 8.2 gallons you get 43.7073 mpg. Normally when I divide the miles by the gallons the mpg is a little lower than what the car’s computer calculates because of the variation on where the pump kicks off. This time the car’s computer and the pump synced.