I've always heard it's better to let a diesel idle rather than shut off and restart, but what's the time frame for our trucks?

so what is the fuel consumption for idling vs restarting?

if I am gonna be less than 5, leave running, or more than 15 mins, shut off and restart?

just one of those stupid things i wonder about

 

You've pretty much got it.

 

It also depends on what the outside temp is. If it's below freezing it'll take less time for the turbo to cool down, but on the other side of the coin, your engine will cool down to the point where the fuel will burn incompletely and leave carbon deposits all over the cylinder walls and injectors...bad stuff. But you're in Florida...that shouldn't matter.

 

It also depends on the neighborhood you're in............

 

I agree.

 

well in some states there is a law that says no idling for more than 10 min. i also hear they might cange it to 5 min. dont know about fla.

 

why would you possibly have a law against idling, except for Cali?

i understand why they would there.