- Joined
- Dec 30, 2022
- Messages
- 381
I have a bx1880 that I’ve always put 15w40 in. I’m assuming it had 10w-30 as the factory fill. After the 50 hour service interval I put Kubota 15w40 in it. The owners manual only recommends 10w30 or 15w40 in it. Being a BitOGeR, I chose the thicker oiL for better wear protection. It has a coolant heater installed and it’s kept in a non heated garage so I figure I just run 15w40 year round and plug
her in when it’s below 32 degrees to get the coolant and oiL toasty.
There are some on orange tractor talk that claim that kubota diesel engines perform better with 10w-30 diesel oil but there’s something about how a tractor is used that I would think 15w40 would provide better wear protection.
Anyway
Can 5w-40 be ran in a Kubota? I know bota owners have run 5w40 in them before but I was wondering if 5w40 could be run as well? I don’t know what Kubotas aversion is to diesel oil other than 10w-30 or 15w40
My little bx1880 isn’t leaving my dads property anytime soon so I always have the option of plugging it in to warm it up before I crank it but I just wanted to know what Kubotas aversion 0w-40 or 5w-40 is?

There are some on orange tractor talk that claim that kubota diesel engines perform better with 10w-30 diesel oil but there’s something about how a tractor is used that I would think 15w40 would provide better wear protection.
Anyway
Can 5w-40 be ran in a Kubota? I know bota owners have run 5w40 in them before but I was wondering if 5w40 could be run as well? I don’t know what Kubotas aversion is to diesel oil other than 10w-30 or 15w40
My little bx1880 isn’t leaving my dads property anytime soon so I always have the option of plugging it in to warm it up before I crank it but I just wanted to know what Kubotas aversion 0w-40 or 5w-40 is?