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Old 08-05-2013
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Re: Yanmar hard starting question

This is similar to another recent thread. In researching oils, the only modern classifications that seem to be ok for Yanmar or heavy use diesels are API ratings of CL-4, CJ-4, and CH-4. Their descriptions specify them as the replacements for all the "obsolete" oils. I stopped looking for the manual-specified CD rating years ago.

Oil companies like Shell and Exxon, etc. spend millions of dollars in additive research done by the best chemical/petroleum engineers in the world. IMO, it is unwise to add a concoction that tries to second-guess them.
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