I would say whatever is approved by kubota for your engine is good to go; follow the recommanded type and weight then get the brand you want.Has anybody on here used or uses AMSOIL in their tractor. I am thinking about switching mine over when I change it next time. I have done some research and it seems like pretty good stuff. You can read about it at www.amssynthetics.com ...
Anybody have any pro's or con's that have used it before I switch...
Thanks
your engine will not die early because you put some Castrol or walmart oil in it; it will die because something else will go wrong (like the water pump, injection pump or the oil pump)
I use a full synthetic oil because I want the tractor to start easy in the cold Canadian winter. I THINK I use some other european brand I also use for my Volkswagen Turbo-diesel. it MIGHT not be what Kubota is recommanding but if it's good for a 360lb.ft 1.9l turbo-diesel hot rod, it will do for my low rpm tractor.