I would use Bio Diesel I would make sure your vehicle can run Bio just to be safe, any diesel engine can use Bio, Bio burns different I'm talking about making sure your emissions components in the exhaust wont be affected A Tractor is different. I'm sure it will be just fine always check with the manufacturer. I'm a Tech and parts and labor are not cheap very costly I wouldn't want you to have to pay what could be well over a $1,000 repair over not making 1 10 min phone call to the dealer. Better Safe then Broke. I've done this for 15 years and if I'm not sure I take the same route as I told you.