My silver car just got 116.8 mi to 1/4 tank, thus 467.2 miles to the tank, divided by 18.5 gallons per tank means 25mpg. Only boosted once. This is after having an entire engine, intercooler, intercooler piping, intake piping, and entire exhaust system coated with oil from a turbo seal going bad. How about that? My land barge gets better mileage than your much lighter 240