[djpilot]

> An F150 consumes ~2 litres of fuel an hour at idle

Where'd you get this number? AFAICT this is not true.

https://www.google.com/search?q=how+much+gas+per+hour+idling...

More like a little less than 1 liter for a 4.6L V8 motor.

[reitzensteinm]

Your link says 0.5-0.7 gallons for the 4.6L V8, which is 1.9-2.6 liters.