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03-06-2009, 06:12 PM
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DWEED
Drives: 3DR 2008 Metorite Metalic Join Date: Oct 2008
Location: Arizona
Posts: 1,161
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Does anyone actually have any proof of the 2-3 mpg loss using the A/C. Last summer I got better mpg using the A/C then I do now with the winter fuel blend. Last summer while climbing a 10 mile long 7% grade at 70 mph I experimented with the A/C. I noticed no power loss while turning it on or no power gain after turning it off.
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Making a decision without following it with an action is still a fantasy. |
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03-06-2009, 07:15 PM
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Steals terrorist's lunch
Drives: 2007 Yaris Liftback Join Date: Mar 2007
Location: Reno, Nevada, USA
Posts: 1,299
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Quote:
Anyone with a ScanGauge can see this in real-time. Within a seconds of turning the a/c system on a noticeable MPG hit occurs. On that grade you likely did not notice a power change because the engine was already at 90%+ load. When that happens I have noticed that the ECU does not allow the a/c compressor to clutch much, if at all.
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- Brian Share the Road I often carry 2 carpool passengers and mountain bikes or snowboards/skis over a 4,500 foot elevation difference. Click the graphic above to see my detailed mileage logs. |
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