My car gets is best economy in summer too, so long as I don't have a passenger. I never run A/C for myself.
Quote:
Originally Posted by ProDigit
The smaller the engine, or the bigger the ac system, the more the mpg drop.
My previous 150hp mid size sedan car had an average of 10% less mpg.
My current 200HP hot hatch car, the mpg drop from the AC is negligible
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I'd say this is probably *mostly* a flaw inherent in the metric of MPG itself.
Let's say hypothetically that running an A/C compressor needs 0.5L / 100km average fuel to burn. In a truck getting 15mpg (15.7L/100km) that's only a drop to 14.5mpg (16.2L/100km). In my Insight getting 90mpg (2.6L/100km), it's a drop to 75mpg (3.1L/100km).