Diesel question

[DarkBlack]

I run the lowest rpm's that I can get the job done with without creating black smoke. That's usually 1,100-1,500 rpm's for general loader work, 2,000-2,500 for required PTO speed work like the chipper, and snow blower. If you're puffing continuous black smoke, you aren't combusting well and need to drop a gear and bring up the revs to make more HP.
But for sure, for almost all tasks, lower rpm's burn less fuel, and that's a good thing

 

[Pete Judd]

I run my boat engine at 1200 rpm, most of the time, but will up it to 2400 for a hour to prevent glazing of the cyl walls.

 

[arlen4720]

You might want to think about using a break in oil (with your dealer's blessing) since you aren't working it hard enough.

 

[oosik]

Hmmm---- What I do with the tractor will naturally dictate the rpm. Except for the first 50 hours - this will mean higher rpm when I use the chipper, when blading deep snow on the driveway or plowing. Otherwise, its usually 1500-1900 rpm for the grapple, land plane, farm wagon or roll-over box blade. I've never had oil consumption between any oil changes. I use standard Kubota dino oil all the time.