Originally Posted by the suicidal eggroll
ECU-reported gas mileage is often crap. What was your actual gas mileage...you know, by filling up the tank and dividing miles traveled by fuel used?
By far the BEST method to figure MPG's. When we drove 15 hours I calculated after every fill up. I averaged 27.8 MPG on the 900 mile trip vs. the 31 that the AP was showing.