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Old 09-08-2018, 08:17 AM   #13 (permalink)
Ecky
Master EcoModder
 
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Join Date: Dec 2011
Location: Vermont
Posts: 3,418

Gaptooth (retired) - '00 Honda Insight
Team Honda
Gen-1 Insights
90 day: 54.26 mpg (US)

Such Fit - '07 Honda Fit Sport
90 day: 41.27 mpg (US)

Connect - '15 Ford Transit Connect XL
90 day: 24.35 mpg (US)

K-sight - '00 Honda K-sight
90 day: 41.61 mpg (US)
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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 View Post
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
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).
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