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DD Series 60 engine oil in fuel
Posted to HD/Fleet Forum on 12/2/2020 8 Replies

As we diagnosed a poor performance complaint on a 1997 DD60 11.1 Liter, we noticed that the fuel was turning black. We fabricated some clear fuel supply and return hoses so we could isolate where this transfer of engine oil and fuel was occurring. We could cle... Login to read more.

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