Quote:
Originally Posted by Outback 325BH
Higher altitude the air is thinner (less oxygen per volume).
Computer controlled engines automatically adjust the fuel/air mixture so you are always running at stoich -- not lean and not rich.
This means less fuel used at altitude.
However, less fuel and air per volume means less power your engine is producing. This means you will often have to push the pedal down more and/or downshift and/or run your engine at a higher RPM to do any given the task at altitude vs lower altitude.
Turbocharged/supercharged engines don't have this problem because the charger force-feeds the engine and can always maintain the ideal amount of density of air/fuel in the cylinders.
A lot of factors to determine actual mileage ramifications.
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That's it, although, my turbocharged vehicles always do better power-wise when close to sea level and better mileage-wise when at higher elevations. The right pedal controls power and fuel flow.
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 Desert185 🇺🇸 (Retired Chemtrail vendor)
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