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OMG... Here we go again.
-Dan "WaIIy" wrote in message ... I have Mercruiser 5.7's 1989 and boat on Lake Erie near Cleveland. My mechanic recommends straight 30wt oil and that's been fine, today he said a new bulletin came out from Mercury and it was something like 30 wt up to 60 degrees F and 40 wt for over 60 degrees F. Now my mechanic says to use straight 40 weight. What do you think? |
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