Glad you got those links up. Some of the other Cummins-specific information is, as you noted, for big truck operators. There is at least one Cummins calculator about truck spec, use, etc, that always recommends a higher rpm than pickups in general use will need, as with this post by
Hohn, a Cummins Engineer.
Another
post by that same gentleman goes into some more depth about proper rpm range for
fuel economy.
.
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2004.0 7,360-lb DODGE Ram QC/LB 2500 2WD/6-speed Cummins 305/555 ISB. Stock, except LEER bed topper and twin muffler exhaust. 180,000 miles at 4,625-hrs @ 39 mph. 15-cpm solo, 25-cpm towing. (22-mpg avg past 37k)
Fuel Log