I purchased my 1st new diesel truck in Dec 2014. At this time I have a whopping 10,500 miles on the truck. Me, being a retired engineer leads me to a lot of research. Use to be that Rotella was the diesel engine oil. Turns our for at least some of their oils, they have reduced the additives that protect the engine such as Zinc. I was a bit surprised at this move by Rotella.
After saying all that, I have used and will likely continue to use Kubota engine and transmission fluids in my 2011 RTV 900 XT. This recipe has lead to no issues on my RTV.
Have a Blessed Day! Philip