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More discussion on I/O motor oil
"Mark" wrote in message ... I have heard and read (in earlier postings) straight 30W oil is good to use, and others recommend 25W40. I have an 1986 350 I/O and have been using the 25W40 for several years, but am now wondering if I can or should use straight 30W oil? Did they even have 25W40 back in 86, or is this an improvement over alternatives? Mark The Rail, Canopy, & LifeLine Hook guy www.ripnet.com/vtf/prod03.htm My understanding is that some of the newer I/O engines based on the GM 350 block come with muti-viscosity oil recommendations. Those of your vintage call for straight 30 weight, IIRC. Eisboch |
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