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#3
10-09-2021, 11:29 PM
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If I recall correctly, I've read that the 5%-10% biodiesel added to most diesel fuels adds sufficient lubricity to protect the injection pumps, at least on the older models (eg, the 617.92_ series). In these engines, my understanding is that the upper injection pump relies on fuel for lubrication, and the lower part of the pump utilizes engine oil.
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Marshall Welch Seattle, WA 1982 300D-T 
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#4
10-10-2021, 08:20 AM
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I add 3 Oz of 2 stroke oil every fill to ensure the IP is getting some lubrication. I do this only to my 92 2.5 turbo since it was manufactured when diesel was not as clean as it is today.
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92 e300d2.5t 01 e320 05 cdi 85 chev c10
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