Ok so the way I understand it, IF it happens on a new engine it can cause poor seating of the rings and short engine life and poor performance, BUT it is possible for this to happen on an older unit if it were run a lot while not under load?

I am asking as I am also curious if this could apply to a truck engine, as my boss starts up his one diesel truck that never leaves the yard and shuts it down while still ice cold. The other truck that leaves the yard once in a blue moon he does almost the same thing to.. I guess what he should be doing is not bother to be starting them once a week if they are sitting there months on end, BUT if he does want to fire them up, he should be taking them out and getting them good and hot? Just curious as I don't want him to screw up the "new used" trucks he has bought.
Thanks again!
A.D