i've definitely noticed increased gas mileage at altitude. maybe because wind
resistance is less.

Rian mullins

John Rodgers wrote:

> Ken, that would be correct.
>
> At altitude that air density becomes less and less in relation to the amount of
> fuel going through the engine, so fuel air mixture goes to the rich side, you
> get incomplete combustion and a loss of power is the consequence. There may be
> some automatic mixture adjustment built into the F/I but it is probably small
> and the limits are reached very quickly if its there at all.
>
> As you may well know, fuel injectiojn systems and some of the big carburetors
> on piston type Aircraft powerplants have auto-mixture controls, and smaller
> aircraft have manual mixture controls that can be operated from the cockpit.
> Never saw an automotive vehicle so equipped.
>
> John Rodgers