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Discussion Starter · #4 ·
Thank you to all who replied. Picked up a quart of John Deere TY26790 Torq-Gard 30w motor oil with a API rating of CF/SL. I did some searching and found that John Deere states it has a high zinc content so I think I will use that. They don't however say how many ppm of zinc is in this oil though. This oil can be used in diesel, gasoline, and natural gas engines.
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