>        You actually answered your own ? before you asked it. In a
> ComputerControlled FuelInjected N'A' vehicle (especially if it is
> OBD2) the lack of AirDensity @ Altitude is compensated for by lowering
> the amount of gas' that is injected into the IntakeManifold so as to
> attempt to maintain a StoichiometricFuelRatio.

So I have a question: Do we dwellers-at-altitude still need to advance
the ignition timing of our wasserboxers with the "1 degree per 1000ft
above 4000ft" rule? The 02 sensor can compensate for less oxygen, but
does it adjust timing?  Google doesn't seem to have a definitive answer.

David