Marine Lubrication
12-05-2008, 05:06 PM
#1371
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Actually yes, often on individual tests the Amsoil test data posted for their product is not as good as some of the compettive products or is equal to them. On their summation of all tests / overall rating Amsoil is always #1 as you say.
http://www.amsoil.com/products/gearl...hitePaper.aspx
I was particularly interested to see that the Red Line 75W-90 was quite a bit better than the Amsoil Severe Gear Lube in the ASTM D-3233 Falex Extreme Pressure Test and that was not even the Red Line Shock Proof Gear Lube which according to Red Line's ASTM D-2596 heavy load test data has roughly half the wear of the basic Red Line. The Torco SGO Synthetic results on the ASTM-3233 test was also better than the Amsoil.
Of the ASTM test protcols that Amsoil used, which (if any) would you consider useful and which would you not in evaluating a drive oil's merits?
http://www.amsoil.com/products/gearl...hitePaper.aspx
I was particularly interested to see that the Red Line 75W-90 was quite a bit better than the Amsoil Severe Gear Lube in the ASTM D-3233 Falex Extreme Pressure Test and that was not even the Red Line Shock Proof Gear Lube which according to Red Line's ASTM D-2596 heavy load test data has roughly half the wear of the basic Red Line. The Torco SGO Synthetic results on the ASTM-3233 test was also better than the Amsoil.
Of the ASTM test protcols that Amsoil used, which (if any) would you consider useful and which would you not in evaluating a drive oil's merits?
Personally, I think they are all important, but if you really want just few to single out, those few would be as follows........
1. Viscosity Index: if a gearlube thins out too much when heated, its not going to protect as well.
2.Shear Stability Test: If a gearlube shears down too much, it also won't protect as well under extreme conditions, such as drives. Thats the one that really caught my eye, in the fact that both Lucas and Royal Purple don't even meet spec at initial viscosity for a 75w-90.
3. Oxidation Test
4.Extreme Pressure Test: For obvious reasons. Drive are under such extreme load and pressures that gearlube has to be a superior product, otherwise things are going to fail!
5. Water Resisitance, I think is huge. Especially in outdrives. The AMSOIL Marine Gearlube can be polluted with 10% water, and not have any effect on it, and last time I checked boats usually are in water.
12-05-2008, 08:58 PM
#1372
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I run the Amsoil 75-90 marine gear lube and change it every 35-50 hours....sorry don't know the numbers. Bottom line is that i have #5's with 900+ in front of them. We went 200 hours and TNT pulled the drives down. They couldn't believe the lack of wear. Put some lower bearings in as a preventive measure and they said to just keep the same maintenance schedule. I was very pleased 
.
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12-05-2008, 10:39 PM
#1373
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Motul ZDDP
Moly 867 and Ca of 1300
12-05-2008, 10:40 PM
#1374
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I run the Amsoil 75-90 marine gear lube and change it every 35-50 hours....sorry don't know the numbers. Bottom line is that i have #5's with 900+ in front of them. We went 200 hours and TNT pulled the drives down. They couldn't believe the lack of wear. Put some lower bearings in as a preventive measure and they said to just keep the same maintenance schedule. I was very pleased .
.
12-05-2008, 10:41 PM
#1375
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12-06-2008, 12:51 AM
#1376
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I regularly do engine oil analysis. What will an oil analysis tell you about drive gear oil that one would need to know or is that a waste of time and money?
12-06-2008, 02:35 AM
#1377
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The same thing that an engine oil analysis will. Is there oxidation, nitration, water, breakdown of additives, wear metals, dirt. All of the above. I think it is a really good idea to test the drives. I am still waiting for my results on both drives and engines.
