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Switched to Amsoil now this happened

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Switched to Amsoil now this happened


Old 08-22-2012, 03:57 PM
Join Date: Oct 2010
Location: Cheboygan, MI
My Boat: 1998 Velocity 280
Posts: 885

Originally Posted by SPEEDWAD View Post
I switched at the recommendation of a good mechanic thats been working on my boat, Amsoil Dominator racing oil 15-50. I will run the boat this week end and see if it gets any better. If it's just cleaning out the crud I would think that would be a good thing. Right?
Dominator 15-50 is the best stuff out there. I would try and use a larger filter if you can fit it and change it frequently for the first couple of oil changes. I recommend staying away from racing filters they pass too much junk. Let us know what filter you have and how much room and we can possibly cross it to a larger version.
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Old 08-22-2012, 04:08 PM
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Originally Posted by ThisIsLivin View Post
I stand corrected it was a 260, 265 was Chevy.
just messing with ya

The Only Time You Have To Much Ammo Is When Your Swimming Or On Fire.
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Old 08-22-2012, 05:34 PM
Join Date: Jul 2006
Location: Oshawa, Ontario, Canada
My Boat: 24 Baja Outlaw SST, LOOKING for nice 29 Outlaw
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I use Rotella in the motor, but, I have used Amsoil in the outdrive and in several tow vehicles, works very well, and I have had several other friends and co workers have great results with it, however as an earlier post stated they DO make several different marine oils. The Dominator stuff is supposed to be VERY good I am told.
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Old 10-16-2012, 03:10 PM
Join Date: Jan 2012
Location: Syracuse, New York
My Boat: 2012 Velocity 290sc
Posts: 21

It appears you are all more expert than me on this matter. I can only speak from experience.
Interestingly I was told by a reputable source that because of the less friction with the use of synthetic oil, roller lifters actually slide instead of the rollers turning as designed. I guess that are a lot of people on both sides of this argument.

Also I had a 1996 Mercruiser 350 Cubic inches that I beefed up with an Eldebrock Performer intake manifold and cam that would not hold decent oil pressure using synthetic oil.

Also I had a ZZ502 502HP (bad choice for marine application) that I had the same issue with.

Also back in the day I had a 66 Mustang GT 289 four barrel which I replaced with a 289 Cobra dual aluminum high rise, solid lifters, and centrifical advance distributor which hated the first synthetics that came out.

The best oil for me always has been non-synthetic Mercury oil in terms of holding oil pressure after the motor has been beat on. My Mercury guy tells me that Mercury beefs up this oil with some descent additives.
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Old 10-16-2012, 03:42 PM
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Old 10-16-2012, 07:18 PM
Join Date: Oct 2010
Location: Ottawa, ON
My Boat: 1989 Force 10 , 2006 Active Thunder (project)
Posts: 365

I have two similar motors as yours : 540s, dart heads and brodix intakes with EFI and a pair of vortech chargers pushing about 6 lbs boost.

They have run Amsoil 20w50 from day 1 (after break-in) and have had no issues whatsover. Hours are 175 right now.
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Old 10-17-2012, 12:21 AM
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when you say more suit than usuial,do you mean black on transom,because that is probibally from being rich ,not from different oil.i know a lot of people use synthetic oil in their boats,i use brad penn 20-50 in my boats and i highly recomend it.
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Old 10-17-2012, 12:36 AM
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I use Joe Gibbs oil or Kendall 20w50 w zink
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Old 10-17-2012, 08:48 PM
Join Date: Aug 2011
Location: US of A
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Originally Posted by GTOKILLER View Post

I use Joe Gibbs oil or Kendall 20w50 w zink
+1. I did run amsoil dominator and now run Joe Gibbs Hot Rod Oil per my builder. He said he runs it in all his high performance motors whether it be drag, circle, pulling, or marine. Supposed to be high in zinc
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Old 10-17-2012, 09:07 PM
Join Date: Sep 2012
Location: Lake Conroe, TX
My Boat: Howard 28' Bullet
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Why is zinc important? Does it also apply to everyday engines?
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