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OMC Cobra Drive Oil
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Author:  zims1993 [ Wed Sep 30, 2015 8:45 pm ]
Post subject:  OMC Cobra Drive Oil

So what is the best gear oil to use in the OMC Cobra, Evinrude HPF Pro or Mercruiser High Performance gear oil? Last summer about mid season I had to have the oil changed at a marina due to the oil dipstick coming loose (noticed sheen of oil after a run), and they put in the blue Mercruiser oil. End of the season last year per recommendation of local marina I changed the oil with Evinrude HPF Pro. So as I am winterizing the boat this week I drained the oil and noticed the remnants of the Mercruiser oil actually separate from the Evinrude HPF. Debating if I should just drain the HPF out and stick with the Mercruiser now...

Author:  LouC [ Wed Sep 30, 2015 8:52 pm ]
Post subject:  Re: OMC Cobra Drive Oil

I've been using the Merc stuff in mine for 10 years with good results...

Author:  deafwish [ Wed Sep 30, 2015 9:21 pm ]
Post subject:  Re: OMC Cobra Drive Oil

Either option would be fine.
Marine gear oils won't really suspend that much water contamination anyway, so also consider an automotive 'performance' GL5 75w90.

Author:  JohnScott [ Sun Oct 04, 2015 9:23 pm ]
Post subject:  Re: OMC Cobra Drive Oil

I used the Merc Hi perfromance in our OMC King drive and continue to use the same in our Volvos with good results.

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