I used to think idling (maybe more than 5 min) was bad for engine, but then I read elsewhere that it's no worse than driving. I think i read that idling with AC on puts alot of stress on the engine. Is this true? Should I turn off the AC if idling for more than 5 minutes? I have a dodge truck, and ideally I could sit in it for 15 minures, idling, with AC on...
Also, in the winter, is idling with heat on any problem?