We ran Delo or whatever was cheap in the Macks I used to drive. Oil changed once a year, stop and go city flatbed use, and those were 1974-95 Thermodyne (filthy running) R685/686 day cabs. My 1991 378 Pete coffin box with a single stack Cummins 14L (525hp/1850 torque) got the oil changed every 10K miles, heavy haul export containers (rig licensed at 104,000 pounds gross combination weight) in the Cascade Mountain Range.
My bike gets 15W40, changed when it quits shifting properly. No idea on the miles, hasn't had a speedometer in almost a decade.