I talked to the Lube Engineers here at Shell, plus others from other Companies, plus I talked to Kawasaki.
All said that Diesel Truck Oil was good to use because of the Zinc and lack of Friction Modifiers..
I've been running Rotella T for many years. No problems.
Many in the club use the Synthetic Rotella. Again, no problems....
In my case, I plan to move to the Rotella Semi Sythetic and give it a try.
No particular reason other than I like the 10W40 rather than the 20W50, and wanted to give the Semi a try.
Ride safe, Ted