20W-50 M-1 V-Twin for HP engines

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Jul 20, 2008
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Who is using M-1 V-Twin with 1600 ppm of ZDDP in their marine HP engines like me?
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I am still using the Merc 25w40 in my twin 7.4L 380HP Horizons because it runs so well with it. Was thinking Vtwin but the price is double.
 
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