When I look at your mileage I can't help but wonder why some car manufacturer does not at least offer an aero option for those that want it . You and CO ZX2 as well as a few others have demonstrated convincingly what simple aero changes can do. These are not high tech changes that would cost $3000 per car. These are straightforward understandable things demonstrating the effects of aerodynamics.
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Originally Posted by basjoos
73mpg (447.1 miles, 6.1gal) Based on the results from the SuperMID, I am averaging 100mpg (42km/l) while DWL on level roads at speeds from 30 to 65mph when temps are in the 80's F, but any sort of urban driving steadily reduces the tank average. The hand throttle has been a great help in getting better mileage at lower speeds where the throttle/mpg sensitivity gets very delicate. Altitude also helps, as I can get somewhat better mileage at 2000ft on I-26 in the NC mountains than I can at similar speeds and temps at 700 ft in the SC upstate (I wonder what sort of mileage I would get if I were driving at 10,000 feet). I have a steep 800 foot climb up into the NC mountains on my way to work and I am only getting about 1/2 of the energy back via FAS coasting that I put into elevation gain while climbing up the mountain. The rest is lost via engine and friction braking. This tank had more urban driving than I usually do.
I just did 510 miles on 11.126 gallons - broke the 500 miles on a tank record trying to be reached by a bunch of xB guys in Scion Life - prior highs were 480-490's with 12 gallons in an 11.9 gallon tank.
I did a lot of engine braking on this past tank - 3 weeks of driving and found that the ScanGauge error was getting up to a significant error. The low fuel light came on at 10.7 gallons and usually it is pretty consistant at 10.0 gallons and it took 11.126 to fill yet indicated I burned 11.5 gallons.
. You and CO ZX2 as well as a few others have demonstrated convincingly what simple aero changes can do. These are not high tech changes that would cost $3000 per car. These are straightforward understandable things demonstrating the effects of aerodynamics. 
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