Yes it OK for your tractor!
Actually better than you really need.
Factory fill is 10W30 conventional oil.
Kubota or Shell Rotella 10W30 would be perfectly adequate for your garage-kept tractor at a lower cost.
But,since we love our tractors,why not use the good stuff?
Good Luck!
This is new to me , T6 used to be 15w-40 dino..no? Now 5w-40 syn, is Kubota Ok with this ? Is this Ok for my B2920?
Thanks.