I'd like to hear from people who use synthetic oil in their Indmar engine. If you want to debate the benefits of synthetic oil, please start a new thread. I'd like to hear from people that have actually had experience with fairly new Indmar 350s. The main reason I ask is because my BMW experienced trouble maintaining a steady idle speed when cold after adding synthetic oil. (I'd let off the throttle and the engine speed would drop down too low and then oscillate up and down as it tried to reach idle speed.) Thanks.
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