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Message: <blockquote data-quote="mllud" data-source="post: 14899" data-attributes="member: 1012">Thats good infofmation and makes sence. They recomend to idle at a minute or two before shutting down. Im sure the torbo still gets hotter after shutdown as does the rest of the engine.I recently rebuilt my lx865. The turbo had a lot of carbon Buildup inside. I took it appart and cleaned everything. What I thought was carbon from the exhaust could have been cooked oil built up. They dont recomend taking a turbo apart but it was that or a new one. The book shows it being rebuildable. the dealer told me they dont do that,they replace them. They dont have mechanics just part changers.My turbo is doing fine at 85 hours since the cleaning.I would like to keep it clean. I dont use offroad fuel, sorry Im running on.If you have some information on that prelube system I would apreciate it.Im not dougting what you say about the oil. Was there an article that you read.? I have been using Rotella T 15w-40 sence the rebuild. 85 hours ago. Would it hurt my engine to synthetic at this point? Mike</blockquote>