I used the Travellers UDT equivalent at the 50hr fluid change. Thing to remember is that it meets UDT specs, not SUDT specs. While it will work, I just bought a 5gal of the Kubota SUDT a few months ago while I was in the shop picking up my bar tread wheels. The UDT isn't as good in really cold weather, and Ohio gets plenty cold in Jan-Feb to justify the SUDT, IMO.