Sorry for such a newbie question, but I just recentlly bought my first Diesel and I was wandering what are all the different opinions on leaving your truck running for long periods of time. A friend "a truck driver" told me it was better to leave your truck running than to shut it off. He said that Diesels use very little fuel while idleing. Just wandering what everyones thoughts are.
I have a GMC 04.5 LLY if that matters.
I have a GMC 04.5 LLY if that matters.