6CTA 8.3 prolonged low RPM cruising

[Denny Gaultney]

First, Tony, thank you for the Forum and your continuous support to Cummins owners.

Currently, we are cruising our 1997 Tiara Express with 6CTA 8.3 Diamonds from Florida to Maine.

Engine hours are now 1,641.

The last 255 hours were logged on this trip at 900 – 1100 RPM. Cumulative GPH is 4.0 total for both engines.

Question 1: Is there a need to rev or increase RPM daily or occasionally to clear soot? If so, is this done under load or in neutral?

Question 2: Should the oil change interval be any different with this mode of operation?

Thank you for any input. Denny

Topic

[Tony Athens]

Denny,

If this is how you always run the engines, then I’d do two things…,

1) Change your thermostats to 180F units.. It would be nice to be sure when you run at such low loads, your coolant temps stay above 180F-190F..

2) Each day or so, I’d run it up to 2000-2200 RPM or so for 2-3 minutes, whether/conditions permitting…

Tony

[Author]

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