Depends on the vehicle, engine, etc. A 1969 Road Runner 440 6pack will burn considerably more fuel idling with the AC on than off. A 2009 Honda Civic 1.8L 4cyl won’t burn much at all either way.
Depends on the vehicle, engine, etc. A 1969 Road Runner 440 6pack will burn considerably more fuel idling with the AC on than off. A 2009 Honda Civic 1.8L 4cyl won’t burn much at all either way.