Diesel oil is great, but it has additives that are not good for catalitic converters and will kill them over time, so don't run that if you have cats.
Please put the keyboard down and go back to eating your hot pocket. The "additive" that kills cats is Zinc, and Rotella and every other oil are less then the maximum allowed by the epa. There may be one or two exceptions like joe gibbs or amsoil euro but i doubt them anymore. Rotella and other oils don't have the higher levels like they used to years ago. I run rotella (the cheap one) in my camaro with a high pressure pump and have 70 psi at idle. Yes OP you can try it, it wont hurt a thing.