Kubota B6000 calls for SAE 80 oil
- Thread starter SkyroLSD
- Start date
I don't see why that wouldn't work. I see where Kubota sells 80w90 oil today and it appears that the consensus on orange tractor board is that it is OK. Since you want 5 gals pails, I would go with the cheaper pricing.
Why wouldn't a standard 75w-90 work?
80-90 is every where so unless you want 5 gallons just go with a common product
If it was mine I'd be running standard 75w-90 or 80w-90. That's what I have in the front diff/hubs on my Kubota. I'm sure what you found would be fine as well.
dnewton3
Staff member
Here's what I could find:
https://www.manua.ls/kubota/b6000/manual?p=38
What concerns me is that there is no mention I can find anywhere about what type of oil. It only states "SAE 80". The viscosity does not concern me as much as the potential for yellow metals in those applications. If you use a gear oil, I'd think it would be safer to use a GL-4 and not GL-5, for a nod to the potential of yellow-metal compatibility.
My recommendations would be for 80w-90 or 75w-90 in GL-4.
https://www.manua.ls/kubota/b6000/manual?p=38
What concerns me is that there is no mention I can find anywhere about what type of oil. It only states "SAE 80". The viscosity does not concern me as much as the potential for yellow metals in those applications. If you use a gear oil, I'd think it would be safer to use a GL-4 and not GL-5, for a nod to the potential of yellow-metal compatibility.
My recommendations would be for 80w-90 or 75w-90 in GL-4.
This may help :
https://www.shell.com/motorist/find...1cy9lbi11cy9lcXVpcG1lbnQvYjYwMDBfRUZ0OFBlOU1k
https://valvoline-eu.lubricantadvisor.com/en/recommendation/136203
https://www.fuchs.com/us/en/oil-chooser/#vehicle/136203
https://www.chevronlubricants.com/en_us/home/chevron-products-selector.html
etc.
https://www.shell.com/motorist/find...1cy9lbi11cy9lcXVpcG1lbnQvYjYwMDBfRUZ0OFBlOU1k
https://valvoline-eu.lubricantadvisor.com/en/recommendation/136203
https://www.fuchs.com/us/en/oil-chooser/#vehicle/136203
https://www.chevronlubricants.com/en_us/home/chevron-products-selector.html
etc.
Why don't you get the Komatsu AXO80 SAE 80 oil?
So your oil lubricates not only the front diff but also transaxle and hubs too. It looks like that is not pure diff oil.
SAE 80 gear oil is thin oil corresponding to SAE 20, no more than SAE 30 motor oil. Any 90 oil will be too thick for that application. If you get any multi viscosity oil makes sure the last number is 80, not the first one.
Most likely any SAE 30 oil will work. Usually that's tge viscosity of the MTF oils. They are plenty of 75W-80 MTF oils but make sure they are API GL-4.
Also make sure it says on it only API GL-4, not both GL-4 and GL-5.
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I mostly agree but would never suggest using the "cheapest" of anything unless it was a quality product on a "buy it now" clearance deal. Gears deserve gear oil and there's plenty of great stuff out there to use.
If you want to go to the multi viscosity 90 route which I'm not sure if it's right, below I listed a few 90 gear oils and can tell you that the Motul 80W-90 of those with MoS2 is extremely thick oil which probably won't work in your case:
https://bobistheoilguy.com/forums/threads/where-to-source-90w-gear-oil.406251/#post-7579961
80w90 is perfectly fine. No idea what you are on about.
It depends what PDS say. It will be way thicker than SAE 80 anyway. See the oil viscosity chart above.
80w90 is fine. It’ll just be a tad thicker when hot.
This is a non American market Kubota from the 70’s. They probably suggested 80w because that is what was easiest to find “word wide” at the time. An American tractor of the same vintage with a portal front axle would have asked for 80w90 too.
This is a non American market Kubota from the 70’s. They probably suggested 80w because that is what was easiest to find “word wide” at the time. An American tractor of the same vintage with a portal front axle would have asked for 80w90 too.
I found SAE 80 gear oil. However, it's neither in 5 gallon nor cheap. It's $25 for a liter.
Amazon - Spectro Golden Gear Lube SAE 80
Walmart - Spectro Golden Gear Lube SAE 80
It's quite thin for a gear oil:
https://www.facebook.com/share/r/18JhJ2r7Kx/
