Rotella-T Multigrade 15W-40 is the older formulation meeting API Service Categories CI-4 Plus and SL
Rotella-T Triple Protection 15W-40 is the new formulation meeting CJ-4 and SM.
CJ-4 has a max phosphate limit (from the zinc diethyl dithio phosphate or similar compounds) of 0.12%. Earlier categories including CI-4 and CI-4 Plus can have more.
Automotive oil with the ILSAC GF-4 emblem has an upper limit of 0.08%. Auto oils without the GF-4 on the label can have more. Motorcycle oils can be higher.
We do not know what zinc phosphorus level Shell put into the older Rotella-T Multigrade. (We really don't know what is in CJ-4 except no more than 0.12%). We do know that all these heavy duty engine oils of all brands keep diesel engine wear under control for 600,000 or more highway miles.
So---use the Shell Rotella-T Triple Protection oil and sleep well. It is a better oil than any 10W-40 except maybe a synthetic motorcycle-specific 10W-40.
Shell has said that the oils pass the JASO MA motorcycle clutch tests.