I posted a similar post about oil and transmission fluid for my Kioti CK30, which I hear is very close to the BobCats. I also researched all the TBN threads I could find on oil, UTF, etc. I am coming up on a 400 hour service (I bought the tractor used at 300) and knew I needed a source for oil and fluid, and wanted to have some on hand for top off now.
From the posts (primarily on Kioti section of forum) I concluded on and purchased from Napa (good recommendations and stores are easy to find). The products were Napa Premium UTF and Shell Rotella oil. I will look at the bottles I bought and post exact names later. This was based on the experience of others on TBN. I am yet to put a drop of oil in the tractor.