I run Rotella T in everything but my 2 cycle engines. The kids cars, my Cummins, my Hustler zero turn mower, the 6520. I even have Rotella gear oil for the rotary mower and PHD gearbox. I also have Rotella synethetic oil in my diesel generator. I forgot why, but my friend that works for Shell said to do it. I think it is because a generator sits alot.
hugs, Brandi