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Morris, IL | Have a JD 7720 with 7k hours and an IH 1066 with rebuilt motor both running on SAE 30 oil. I'm in process of changing 7720 oil and I see we are out of SAE 30, wondering about switching it to 15/40 like rest of our equipment? The book says 15/40 is fine I just wonder about doing this with so many hours, currently doesn't use much oil and I don't want to change that. Thanks in advance, trying to make this decision today.
Edited by NEILFarmer 7/28/2014 12:30
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Engine oil in older diesel motors
