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BMW 3-Series (E90 E92) Forum
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A/C kills gas mileage
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| 10-09-2014, 05:59 PM | #1 |
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First Lieutenant
 
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A/C kills gas mileage
This week is the first week in a long time that I've been able to drive around without needing to turn on the air con, and wow my gas mileage went up so much. I used to get around 280 miles between fill ups and this last time I went 320 miles.
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| 10-09-2014, 06:37 PM | #2 |
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Lieutenant
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well yeah,. the DME has to up the idle to compensate for the extra load on the engine. higher idle and load = more fuel needed
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| 10-09-2014, 06:43 PM | #3 |
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Banned
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Mythbusters did an episode on this:
Long story short AC off works well in the winter. In the summer months windows down creates a less efficient drag. |
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