Steve,
I would contact any John Deere big equipment center for the answer. Did you remover it from you damaged steering box and will you be replacing it with more of the same?
Ray(64BJ8P1)
Yep, the EPA and CalRecycle are a bit vague on grease. The EPA, on their website, https://www.epa.gov/hw/reference-table-question-what-used-oil, the following table:
View attachment 52190
Since corn head grease is a petroleum product, not an animal or vegetable oil and not a solvent, it appears to fall within the "oil" category, so it would be acceptable as used oil.
As much as we'd all like to believe our dutifully recycled oil is processed and re-used, it ain't necessarily so. I was in Virginia City, NV once and took a ride on the old steam train they have there. I assumed they were burning wood or coal, but when I asked one of the train personnel what they were burning he said 'recycled oil.'
Might be worth a call to a local auto parts store. Several in my area take oil. I have even brought used anti-freeze to Jiffy lube.