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Re: cleaning out the engine
I think your machanic is nuts! There are detergents in the oil you use and should work well to keep the engine clean. If you really want to clean the engine AMSOIL has a cleaner that can be used to change to synthetic oil that is designed to remove deposits from inside the engine. You cannot drive while it is in the engine but it does work. Of course once you complete the process you need to change the oil immediately.
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