OK, listen up guys. I'm with Gore on this one......

If you don't need heat or AC why would you let your engine idle? Is it a macho trucker thing?

Dale....idling is not good because of the low temps and the sooting, but where did the minute come from? Did the advisor that told you that ever drive one of these in the real world, and if so has he never been stuck in slow moving traffic?

BTW, a parallel to this is the generator. If you are going to run your generator, load it up and make it work. They will work best under load and unless loaded they also will load up with soot. If you do not often get the chance to load it, on occasion run it with all ACs and the toe space or Webasto heaters on to pull as heavy a load as possible.