[Numzldr]

In my intro I talked about the oil and cap in the 2021 TS I just bought looking slightly milky/off colored. So today I went to change the oil n filter but wanted to check my 10w30 against JD specs first. I'm getting pissed because my oil doesn't meet specs posted in the manual. It turns out API upgraded oil specs in May 2000 and JD didn't upgrade their manual. Whereas JD manual says meet IILSAC GF5 and API SN that's been superceded

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The American Petroleum Institute (API) is the only national trade association that represents all aspects of America’s oil and natural gas industry. Our more than 600 corporate members, from the largest major oil company to the smallest of independents, come from all segments of the industry.

www.api.org

Oil marketers may now license oils meeting ILSAC GF-6A as ILSAC GF-5 and API SN, GF-6B as API SN and API SP as API SN.
So my plain jane WallyWorld oil will work but now I'm afraid I'll run out of daylight before I get it all done so the oil change will have to wait.
This may be relevant to other models as well but I don't know that for sure

 

[Jux]

I would go with the oil companies and API's recommendations for suitability over JD's specs any day of the week. After all, JD doesn't formulate and produce oil, they just brand it, like Caterpillar.