I went to O'reilly first, and the guy started laughing and "knew" without looking in any sort of publication that there is "no way" to get the stuff. Unfortunately, I knew that was going to be the case. At least the guy at NAPA looked in the book..
So, I then when to tractor supply to check out all the hydraulic oils there... most of them are 20w equivalent. I found one that said
10w20 equivalent... also, there were a bunch of oils that told what they would work in, but none of the initialisms were recognized by my brain.. I am hesitant to put something multigrade in there.There is a bigger town about half an hour to the south, so i will call around down there and check around.
If you would like, I'll get you the part # that O'Reilly uses. Outta curiosity, why isn't O'Reilly on your "first" list?
Mike