2012 Ram diesel with over 1million miles

colliehauler wrote:

valhalla360 wrote:
Long continuous runs are the best for getting lots of miles out of an engine.

For your typical user, a million miles would be 40-60yrs, so not particularly relevant.

Most engine wear is the start/stops and moisture build up from short trips. On another forum a V-10 in a airport shuttle that run almost continuously was reported to have gone 900k miles.

.... And I'll bet that shuttle V10 spent a lot of hours idling, too.

So ... why do I read so much in the forums that "it's not good for an engine to be idled"?

(Recently I've started partially charging my RV batteries every other day or so when drycamping by merely idling the V10 for about an hour. The alternator dumps a lot of current into the batteries during that short time and the V10 can hardly be heard or felt at idle.)