what oil to run in motor
08-05-2010 | 06:40 AM
#31
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Joined: Oct 2005
Posts: 756
Likes: 1
From: New Hartford CT
If an oil's flow rate meets or performs "like" a 20w oil and when elevated to the proper test temp, meets or performs "like" an SAE 50 that particular is a multi-viscosity oil period.
It does not make any difference if the oil was blended with straight cut base stocks or with a polymer.
If thereis a "w" in the descriptor of the viscosity, I am sorry to say, it is a multi viscosity.
Knot 4 me sorry for jumping in your S***, but just because Mercury says something doesn't mean it is correct, espically with something they don't even manufacture.
Ken
It does not make any difference if the oil was blended with straight cut base stocks or with a polymer.
If thereis a "w" in the descriptor of the viscosity, I am sorry to say, it is a multi viscosity.
Knot 4 me sorry for jumping in your S***, but just because Mercury says something doesn't mean it is correct, espically with something they don't even manufacture.
Ken
08-05-2010 | 07:31 AM
#32
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Joined: Jun 2005
Posts: 8,407
Likes: 797
From: Central IL
If an oil's flow rate meets or performs "like" a 20w oil and when elevated to the proper test temp, meets or performs "like" an SAE 50 that particular is a multi-viscosity oil period.
It does not make any difference if the oil was blended with straight cut base stocks or with a polymer.
If thereis a "w" in the descriptor of the viscosity, I am sorry to say, it is a multi viscosity.
Knot 4 me sorry for jumping in your S***, but just because Mercury says something doesn't mean it is correct, espically with something they don't even manufacture.
Ken
It does not make any difference if the oil was blended with straight cut base stocks or with a polymer.
If thereis a "w" in the descriptor of the viscosity, I am sorry to say, it is a multi viscosity.
Knot 4 me sorry for jumping in your S***, but just because Mercury says something doesn't mean it is correct, espically with something they don't even manufacture.
Ken
08-05-2010 | 08:30 AM
#33
Frank's Marine Service
Joined: Sep 2002
Posts: 11,959
Likes: 142
From: Elkton, MD
If an oil's flow rate meets or performs "like" a 20w oil and when elevated to the proper test temp, meets or performs "like" an SAE 50 that particular is a multi-viscosity oil period.
It does not make any difference if the oil was blended with straight cut base stocks or with a polymer.
If thereis a "w" in the descriptor of the viscosity, I am sorry to say, it is a multi viscosity.
Knot 4 me sorry for jumping in your S***, but just because Mercury says something doesn't mean it is correct, espically with something they don't even manufacture.
Ken
It does not make any difference if the oil was blended with straight cut base stocks or with a polymer.
If thereis a "w" in the descriptor of the viscosity, I am sorry to say, it is a multi viscosity.
Knot 4 me sorry for jumping in your S***, but just because Mercury says something doesn't mean it is correct, espically with something they don't even manufacture.
Ken
That's the key differentiator in my mind.
Here's an informative article here for the others concerned about using a multi-visc. vs. straight weight; http://www.blackstone-labs.com/oil-viscosity.php
Last edited by Panther; 08-06-2010 at 08:06 AM.
08-06-2010 | 08:31 AM
#35
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Joined: Jul 2004
Posts: 11,332
Likes: 73
From: chicago
My favorite brand that seems to work best is........FRESH OIL.
Everbody gets their panties in a bunch over what brand is better than the next, 25w40 vs straight 40, and so on.
you can have brad penn, amsoil, royal purple, or whatever you spend 10 bucks a quart on, and if you dont change it often, its as good as junk once it get contaminated with fuel, carbon, moisture, etc.
My advice is use a good name brand 20w50 and use a wix filter, change it often, and keep tune up in top running order. The engines will live a long time. Your 4.3 will be fine with some castrol or pennzoil from wally world.
Big rig engines go a million plus miles, mostly using fleet oils. Diesels or not, bearings are bearings, lubrication is lubrication. Key is maintance intervals.
Everbody gets their panties in a bunch over what brand is better than the next, 25w40 vs straight 40, and so on.
you can have brad penn, amsoil, royal purple, or whatever you spend 10 bucks a quart on, and if you dont change it often, its as good as junk once it get contaminated with fuel, carbon, moisture, etc.
My advice is use a good name brand 20w50 and use a wix filter, change it often, and keep tune up in top running order. The engines will live a long time. Your 4.3 will be fine with some castrol or pennzoil from wally world.
Big rig engines go a million plus miles, mostly using fleet oils. Diesels or not, bearings are bearings, lubrication is lubrication. Key is maintance intervals.
there is no other 
08-06-2010 | 10:57 AM
#38
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Joined: Apr 2010
Posts: 549
Likes: 0
My advice is use a good name brand 20w50 and use a wix filter, change it often, and keep tune up in top running order. The engines will live a long time. Your 4.3 will be fine with some castrol or pennzoil from wally world.
Big rig engines go a million plus miles, mostly using fleet oils. Diesels or not, bearings are bearings, lubrication is lubrication. Key is maintance intervals.
Big rig engines go a million plus miles, mostly using fleet oils. Diesels or not, bearings are bearings, lubrication is lubrication. Key is maintance intervals.
All the other claims are snake oil. A good brand name oil changed at regular intervals is the key.
08-08-2010 | 06:07 PM
#39
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Joined: Jul 2004
Posts: 11,332
Likes: 73
From: chicago
yup. Kendall 20w50 titanium is what im using. Zinc is important for those flat tappets.
