Fuel consumption of 2.7 liter at idle? Hurricane related

I'm prepped for the storm here in Florida but have no generator. If we lose power for days-weeks afterwards I am hoping I will be able to cool off in an emergency in my truck...

What is the fuel consumption rate of a 2.7 liter engine at idle, with the AC on? Any guesstimates or science to help here? May not be able to refill the gas for a while if my supplies run out.

 

I couldn't find into re: AC on but one source stated: The estimated fuel consumption of an idling engine is 0.6 litres / hr per litre of engine displacement.

Another: https://energy.gov/eere/vehicles/fa...umption-selected-gasoline-and-diesel-vehicles

Aprox. 0.3-0.4 gal/hr, which at a full tank of 21.1 gal -> 70-50hrs of run time.

Definitely prop the hood up for less heatsoak/best cooling.

 

Disregard.... i may need a charge