My Mahindra 1533 Shuttle says i can use one of 7 different brands. I've heard a lot of people like Rotella. It is not listed on the list of options. Will this be covered under my warranty is my question?

Yes, this is a good trans/hydraulic fluid and is directly compatible with the J20C spec, and many, many others. However why would you pay more (on average $20 more per 5 gallon pail) for this fluid, over the store brand (Traveller) Premium Universal Tractor Transmission/Hydraulic fluid? I've run lower-cost fluids & lubricants in our farm and construction equipment for several decades without any failures. The key is to use the CORRECT ISO standard specification lubricants for your specific tractor's / machine's manufacturer recommendations. Not sure what the other fella that left a review earlier is paying for his "dealer oil", but I can tell you, at the Shell Rotella price, you can buy many of the manufacturer-branded fluids at your local dealership for basically the same money. I cannot recommend this fluid strictly because it is overpriced for what it is.