What is better while waiting for a ride: idling the car or turning the engine off. For the down time between trips, I'm trying to figure how to keep expenses low. It's great when you have a pickup for a new ride right away and close by from the last ride's pick up but that is not always possible. Sometimes there is a wait for a new request or you get a request that is like 8 miles away, no way putting that many dead miles to get a ride. So which is better? Idling uses a bit of gas but turning the engine on and off has to be killer on wear/tear of the starter and engine. Which do you do? I know temperature can effect a decision, too.