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Motor oil selection help.

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Old 02-14-2011, 06:36 PM
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Default Motor oil selection help.

I have twin 496's, low hp (375 each) Can I please get a motor oils recommendation . In my motorcycles and cars I use full synthetic. Might be Harley brand or Amsoil in my triumph. Mobil one in my truck. Should I use the same (one of these) in my Mercuiser? I don't care how much it cost, I want the best quality. Thanks
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Old 02-14-2011, 06:50 PM
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Run a non synthethic 20w-50, I like Kendall GT1 and the Merc HP filter.
A friend has a 496 Mag boat also one with HO's. No oil burn and psi was good for 40hrs of use.
http://www.conocophillipslubricants....0TDS%20Web.pdf

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Old 02-14-2011, 06:59 PM
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Mobil 1 Vtwin 20w 50, Royal purple, or Amsoil Dominator Racing Oil
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Old 02-14-2011, 08:50 PM
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Mobil 1 15w-50 ran it 25 + years in three different boats ..... no problems.



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Old 02-14-2011, 09:30 PM
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I run Mobil 1 15w50 in my 496HO's. I've used that oil in merc big blocks since 1996.
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Old 02-14-2011, 09:57 PM
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Quote:
Originally Posted by shekmark View Post
I have twin 496's, low hp (375 each) Can I please get a motor oils recommendation . In my motorcycles and cars I use full synthetic. Might be Harley brand or Amsoil in my triumph. Mobil one in my truck. Should I use the same (one of these) in my Mercuiser? I don't care how much it cost, I want the best quality. Thanks
AMSOIL Dominator 15w-50 Racing Oil. I don't know why people would run a petroleum product in their thousands of dollar motors. Why wouldn't you use the best? I run about 65 hours/season, and my oil analysis with the AMSOIL still come back perfect. I would also recommend the AMSOIL EAO-24 oil filter.
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Old 02-15-2011, 06:00 AM
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Guys watch out for the regular Mobil 1 15W-50 it is not what it used to be, they've reduced ZDDP, I used it for years as well and still use it for my cars........
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Old 02-15-2011, 08:21 AM
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I got the same motors in my 33 and I have 760 hrs
useing merc oil and never a bit of a problem.
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Old 02-15-2011, 08:35 AM
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I get my Amsoil from 07DominatorSS he is the Amsoil man so he says run it I do!
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Old 02-15-2011, 09:14 AM
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What is ZDDP? Thanks
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