Fuel Saving Tips
Air conditioning puts a big load on the engine and can be several kilowatts. So when you want to slow down in a vehicle with non-regenerative braking, keep a cool or warm cabin WITHOUT hurting mpg, switch leave the engine in gear and turn the air-con on full hot or cold. No fuel is supplied to the engine when the pedal isn't depressed and the air-con provides the braking that would otherwise be lost as heat. It's great for going down an incline to maintain a constant speed too!
posted by Charles1989 on September 29, 2016
this tip works for 30% of voting Fuelly members.