Thread: No Diesel oil
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Old 04-08-2025, 02:54 PM   #8
RalphG
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Location: Sask. Canada
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Default Re: No Diesel oil

The video was talking about fuel injected engines. I've run Case-IH 15w-40 diesel oil in my flathead Merc for the past ten years with no worries. For no other reason than I had that oil on hand at the time. I've since used 10w-30 diesel oil in several IH sixes and a GM V8. All carbureted old engines and working just fine. No worries about zinc just trying to have more engines running the same oil to simplify things.
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