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Old 08-22-2011, 01:54 AM   #4 (permalink)
t vago
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You also have to consider that, on humid and warm days, there is effectively less oxygen being drawn into the engine, compared to cooler and less humid days. This requires that the driver open up the throttle a bit more to get the same amount of output power, which will reduce pumping losses in the engine. This will also cause fuel efficiency to go up.
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