Quote:
Originally Posted by ChazInMT
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.