I ordered 4 gallons of Kubota super UDT2 from Coleman's tonight. I found a spec sheet for the oil and the numbers look a lot better than the conventional UDT oil. Especially during the first minutes on cold start up. Coleman's had a 10 % price cut on the case price plus their shipping to North Central Texas was about 1/2 that of Messicks. Coleman's shows to be in Kansas and I think Messicks is in PA. Its about 6 quarts more than I need right now but its a good idea to have some extra on hand in case a hose breaks and I need to top the system back off..
One other interesting thing about the super UDT2, the spec sheet showed there was a reduced amount of foaming compared to the conventional UTD oil.
Again thanks for all the input!!