to me it's just snake oil, but i know i'm stepping on a lot of toes almost to the point of religious insult. if equipment manufacturers saw increased benefit, wouldn't they recommend as well? you might post your question as well on the "fuels & lubricants" forum just to see what kind of another oil war might be started...but really, sarcasm aside, why not ask a few Kubota mechanics @ different dealerships their take (not service managers!) good luck, just keep the filters changed and UDT or SUDT and you should be good to go!