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Old 08-31-2010, 05:47 PM   #20 (permalink)
euromodder
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The SCUD - '15 Fiat Scudo L2
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Quote:
Originally Posted by ChazInMT View Post
Question...How much does the AC kill mileage?? I'm guessing a 8-10% hit (3-4 mpg to me), what is the general rule of thumb on this?
That won't be far off the mark.
When using CC, I'm instantly using 10% more fuel when switching the A/C on.
When left on, the FC drops down again to slightly above previous amount - until the time when the AC comes on again (like when setting a colder temp).

When I switch it off when its running full blast (think defog) it's an instant 10% increase in FE.

The weird thing is I only saw this happening after I had CC installed.
Before that, I didn't believe it could make such a big impact as I wasn't seeing any, but apparently it does.

With the ScanGauge, it also shows up in the engine load.
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