I only use high cetane low sulfur BP Supreme On-Road #2 diesel in our four tractors as well as our two turbodiesel motorcars.
Seeing that you have a Kubota 3130, that is what I would suggest is best for you too.
If your diesel engine is over 25 years old and has >5,000 hours on it, you might want to stick with high sulfur #2 simply because the fuel injection pumps prior to the 1990's used weaker O-ring material and are prone to leakage with modern fuels due to dehyrdration of the O-rings.