Oil & Fuel Gear oil in front axle specs

[ovrszd]

Great test... I love it when someone brings some empirical data to the table... I mean forum. Now I would say... what about at different temps. Some oils viscosity might vary comparably at low temps (if anyone cares). Just stirring the pot here.

I mentioned the temp in my test to use as a base. If our predicted bad weather moves in later in the week, I'll get shop bored and try putting my test oils in the freezer and then retesting.

I'm a Monkey see, Monkey do kinda guy. I struggle with charts and graphs.....

 

[Bluegill2]

To illustrate how these products vary in viscosity:

Hy-gard has a viscosity of 59 cSt @ 40C. Using the chart Harry provided, (thank you), you can see from the scale on the right hand side, it's the same as 80w gear oil.

Kubota SUDT is indeed slightly thinner, 37 cSt @ 40C. putting it in the top range of 75w gear oil. But, it does thicken to perform as 80w at 100C, with 8.1 cSt.

Amsoil ATH, (what I use), is 53.7 cSt @ at 40C. and, 9.8 cSt @ 100C. Both would be 80w on the gear oil scale.

I used to have a link to the spec's for Permatran, (hard to find), but I don't anymore. For some reason MF keeps them a secret. :laughing:

So, if you have one of those ugly orange tractors, you could look for a gear oil in the higher viscosity range, and indeed have an oil in the front axle that would be slightly thicker, to help with leaks. Whether it is enough to matter is the next question. :confused3:

I appreciate the info. Good to know the oils are close, I guess. My brain still sees SUDT2 as thinner than 80W-90 and always will. Just shake the jugs! SUDT2 sure does pour easier! Not that it matters? Might matter in the front axle?

If I get frozen into the shop like ovrszd I might do a little test. I have both oils on hand.

I sure don't think I'd like any of my hydraulics running on 80w-90...

 

[DeereMann]

Ray is spot-on. Also, for those of you in the north country that use tractor in the winter, be sure to use synthetic GL5 gear oil - the tractor will move much easier, esp. for those of us up in the great white north where it really gets cold!

Mobil & Amsoil are usually available at your local supply stores. The little extra cost for the few times you change it is worth it for esaier movement & reduced wear. I also use it in my snowblower auger drive gearbox. :2cents:

 

[ray66v]

I sure don't think I'd like any of my hydraulics running on 80w-90...

Your hydraulics would actually work fine if you put in 80w gear oil, 30w motor oil, or even automatic transmission fluid. It's all oil. It's all about the same viscosity.

The difference in oil is mostly in the additive packages, which can be widely different, and are designed for best performance in each specific application.

In some cases, specific additives are mandatory for things like high temperatures, high pressure gears, wet brakes, pumps, or clutches. So, these oils are not always interchangeable.