A Diesel at Idling RPM’s .......

2ndhom wrote:
I periodically read a thread that relates to an engine that idles too frequently ( an unknown amount of times ) and not run at highway speeds is not a good idea. But .... I never read the mechanical reasons why. I usually start and let my Cat 400HP run for 30 minutes every 2 weeks. Mostly the thread answers are: it's the oil that doesn't have the ability to lubricate correctly or something relating to ???? Anyone have the facts? Just the facts Mam, as Sargent Friday would say.

Diesel engines will not reach operating temperatures when sitting at idle.

Most diesel vehicles have the ability to raise the idle of the engine by using the cruise control. Even my F350 Power stroke engine will automatically raise the idle if sitting still and in park (the ECM does it). My American Dream has the ability to raise the idle with the cruise.

If you are starting your engine so that it does not sit all winter the 30 minute time range is ok, but raise the idle to 1200. Other wise it is best not to start it.

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