How long do you let it warm up?

[jimmm]

Your truck I mean. When it's cold out, under 40, do you let it warm up, if so how long? On gas motors unless I was trying to defrost the windows, or was being a wimp, I usually just start, wait 10-15 seconds and go. Take it easy the first few blocks. But on a diesel, is it worth the trip to let it idle to get to running temp? Or does that just waste fuel and carbon up everything? I been letting it run for a minute or two, start it, get tools, scrap windshield,etc , then go. The last I heard the EPA said it wasn't "green" to let them idle, but they don't pay for my repair bills either.

[dhanna6powerstroke]

You'll get a lot of different opinions on this. Below 40, I let mine run about 5 minutes, below 20 I let ir run for 15-20 minutes.

[Jesse S]

If it is really cold out (0-20 degrees) I will try to make sure mine is plugged in and then let it idle for around 10 minutes. If it is 32 degrees or warmer I don't worry about plugging it in and let it warm up for 5 minutes or so. I don't believe a diesel gets up to true operating temp just sitting there idle, you have to drive it a ways. And no matter how long I let my truck warm up, I take the first few miles easy on it. The hardest thing on a diesel is starting it in the cold, driving it a couple miles and shutting it down before it gets warmed up imo.

[LNS4x4]

here you go..........LET IT WARM UP?