Why no glow plugs?

[transit360]

I am curious about this statement b/c I've been told that the
reason big trucks going OTR get such high mileage out of their engines
is b/c they never really cut them off. They just leave them running
and running... This helps b/c the engine nevers experiences
temperature changes like from starting, which we all know is when the
most engine damage is done.
Why wouldn't the fuel burn completely if the engine were just
idling...unless it was running to rich or something? I'm not arguing I
just haven't heard of this before. What would you say about trucks
idling like truckers do overnight at rest stops?

Steve
2 '98 Bluebird Q-buses

> "One of the reasons you should never let a diesel idle for an
> extended period is the fuel doesn't burn completely and liquid fuel
> washes the oil off the cylinder walls and that's bad for the engine."
>
> George Witt
> 81 FC 35
> Lincoln, Nebraska
>