Holie Crappy MPG's, Batman!

[flynrider]

I rarely ride below 8,000'. Less oxygen at altitude means less fuel is required to maintain the stoichiometric ratio. Or something like that.

Basically, the engine makes less power at higher altitudes. Less power means less fuel consumed. With less oxygen available in a given volume of air, the EFI system reduces the amount of fuel it sprays in.

Slide carbs in old bikes wouldn't compensate for thinner air, so riding at high altitude meant that you wouldn't see any mpg improvement at altitude, plus your rich running bike would perform badly. I love EFI

My all time best mileage was a high altitude afternoon ride in Colorado. Buena Vista, Leadville, Breckenridge, Salida. I managed 57 mpg on that tank.