New to the Diesel truck motors, but in the Marines I worked on amphibious tracked vehicles that had 903 cu in turbo Cummins in them. After a few good heat cycles of light load - full running temp achieved - they were turned loose, to be run like your life depended on it!
My bike mechanic says after a few heat cycles, break it in like you are gonna drive it. Ride it easy and it will break in to be ridden that way. Example; while at Myrtle Beach Bike fest back in 09, there was a Dyno trailer and I watched 2 guys that brought their bikes in to be dynoed. SAME MOTOR, transmission, gearing, ect. SAME upgrades done by the same mechanic, but 1 bike would consistantly outrun the other. Dynoed both bikes and sure enough, one was putting down about 8% more than the other. The dyno operator asked "Who broke theirs in like they stole it?". The guy with the faster bike said, "After a few easy rides, I rode it like it was stolen".
Another example of 2 similar bike motors; 1st guy rides it hard as he can when he can, 2nd biker rides it easy most of the time - he had a knock form in the motor. When torn down, it turns out to be a layer of carbon formed on top of the piston, that breaks loose and knocks! Mechanic told him to "wind it out every now and then - to keep from forming the buildup". As for my bike? My mechanic asked me the first time I took my bike to him and he had to remove excessive fuel adjustment another mechanic had created, "Do you ride it like a crotch rocket?" "this should be fouling plugs with this much fuel!" Yea, I'm the 1st guy in example 2. Planning on running my 5.9 hard - now and then, to blow the carbon out.
Bob and sometimes - Nina - a Staffordshire Terrier/a SPOILED pit and her kitty Spaz
2006 Dodge SLT 2500 4x4 Cummins Quad Cab w/AT and 3.73
2007 Salem Sport LE 26FBSRV (TH) w/ my Victory Motorcycle in it or a EZ GO Shuttle cart.