Thanks, I think its pretty great mileage too considering the temperature.
As for the PTC heater, this is how it operates. It seems to me that the programming / logic is highly programmed to provide comfort, not necessarily efficiency.
Quote:
It is called PTC heater (Positive Temperature Coefficient) and it will operate under the following conditions:
-Engine running
-Blower fan on
-Temperature setting: any except MAX cool
-Outside temp 59 degree F or lower (ambient temp sensor is at top of lower grill opening on driver side)
-Engine coolant temp 167 degree F or lower
-Generator output 70% or less
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