a lot of the newer diesels can be very picky with fuels types. My 04.5 doddge ram which has the commonrail 5.9 does not like veggie at all and cummins doesnt recomend anything higher than B20-30 biodiesel.
but I do know a few 06 and newer powerstroke owners 100% Waste veggie oil.
I do know they have to filter the crap out of it. it can not be directly poured in. they also use a special filter that works really well.
So If I were you i would see what Kubota suggests for alternative fuels in their motors. I would also look into a biodiesel maker instead of veggie. Veggie will definitley have more maintenance