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303 transmission and hydro fluid


I won't say if it will be ok or not. The by the book answer is 303 is obsolete (and oils claiming to be 303 are banned from sale in several states). John Deere 303 used sperm whale oil in the formula and sperm whale oil is no longer available, so how can it be 303? Oils meeting the current John Deere spec JDM J20C are what is recommended by JD, if not using John Deere Hy-Gard.

Some will say the oils called 303 are fine, they use it with no problem. Others will say you will kill your tractor with 303. I choose to use oils meeting the current JD spec. Read the labels on the container or ask the vendor for a spec sheet to see the manufacturers' specs and oil meets.

Bottom line: What you chose to use in your tractor is your choice.
 
I don't understand how oil can be represented as 303 when it has been an obsolete specification for decades. One would think that Mother Deere should be able to ban the use of the 303 name. After seeing the brown crud in the bottom of several pails of yellow bucket 303, I don't know if I would even use that junk in a log splitter.
 
To add to my post, if it doesn't have John Deere specification J20C on the pail, don't use it. 303 has no real meaning anymore.
 
I don t recommend 303 hydraulic fluid. I ended up buy a tractor and for it to move it needed hydraulic fluid. When the po opened the backer and took off the seal, at least a gallon of water came out (you could see the water switch to oil). I m good.
 
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