On the subject of the AC system's efficiency, when would be the best time to use it? I assume that other than only using it while braking in DFCO, the next best scenario would be using it at idle while coasting rather than while cruising or climbing hills?
According to my Scangauge, my idle fuel consumption is around 0.2 GPH with the AC off and turning the AC on increases that by about 1/3 to around 0.3 GPH.
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