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Be cautious about using 100 W or Plus. If your engine has a filter, AND has
been using oil other than mineral oil, then you can use 100 W. But these engines
were designed to use mineral oil, and if that is what has been used since
overhaul, I recommend continuing to use it. If you switch to 100 W or Plus,
after using mineral oil for several years, you could really mess up the insides
of the engine by breaking loose a lot of carbon. The carbon can block oil
passages, and really create havoc with the internal workings.
Lynn Nelsen
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