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06-11-2009, 03:17 PM #1
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- Feb 2009
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NOACK Volatility Test Is A Critical Measurement of Motor Oil Quality
AMSOIL was the first motor oil company in North America to use the NOACK volatility test to measure motor oil quality and performance. Although competing motor oil companies initially paid no attention to NOACK results, the test has since become a critical measurement tool throughout the industry. Originally developed and used in Europe, the NOACK volatility test determines how much weight an oil loses through volatilization. The more a motor oil vaporizes, the thicker and heavier it becomes, contributing to poor circulation, reduced fuel economy and increased oil consumption, wear and emissions. During the test, the subject oil is heated to 150įC for a specified period, causing the lighter oil molecules to boil off. The results are reported in the percentage, by weight, of the oil that evaporates. The lower the number, the better the oil resists volatilization.
Because they are made from impure, irregular molecules, conventional motor oils are more susceptible to the effects of heat. The small, light molecules in conventional oil tend to evaporate (volatilize) as the oil is heated, leaving large, heavy molecules behind and leading to oil consumption and an increase in the oilís viscosity. If those large, heavy molecules are chemically unstable, they may also break down and form deposits on component surfaces, further inhibiting the release of heat into the oil stream.
Because their formulations minimize the quantity of impure, irregular molecules, synthetic motor oils are generally more resistant to volatilization, allowing them to perform better than conventional oils in the NOACK volatility test. However, due to varying qualities of base stocks and additives, not all synthetic motor oils perform the same in the NOACK test.
Modern engine designs generate more heat than ever, accentuating the importance of the NOACK volatility test for determining an oilís ability to provide an adequate level of protection and performance. More horsepower, turbo chargers and aerodynamic styling have created extremely hot environments that receive less cooling from outside air, and high heat leads to oil oxidation, deposits and thickening in conventional oils.
Because AMSOIL synthetic lubricants contain only uniform molecules, they are much more resistant to thermal and oxidative breakdown. AMSOIL synthetic motor oils help keep components free of damaging varnish, deposits and sludge.
To qualify for the current API SM motor oil specif cation, gasoline motor oils cannot experience a weight loss of more than 15 percent in the NOACK test. AMSOIL synthetic motor oils were exceeding modern requirements over 20 years ago, while many current motor oils still have a hard time meeting this minimal requirement, increasing wear, fuel consumption and emissions.
As seen in the graph, AMSOIL 10W-30 Synthetic Motor Oil (ATM) easily falls below the maximum 15
percent volatilization rate dictated by the API SM motor oil specification.
If you would like more information on AMSOIL synthetic products please contact me.2008 GMC Sierra 2500HD Ex. Cab, Fire Red, 6.6L Duramax LMM Equipped with UTG Rocker Pods
AMSOIL is the only oil company that...,"Recommends 25,000 mile oil changes","Gives up to four times better wear protection","Warranties your engine against oil related failure"
06-11-2009, 06:32 PM #2
Do you have chart that compares your 0w-30 to mobil 1 5w-30?2000 GMC Sierra Ext. Cab 5.3L
06-11-2009, 07:47 PM #3
- Join Date
- Feb 2009
- Blog Entries
Here is our Competitive Motor Oil Study
And here is our Data Bullitin on SSO 0W-30
If I find something I missed I will let you know, sorry I do not have what you are exactly looking for. No other company out there has as much literature as AMSOIL but we still do not have everything I guess.
Last edited by 1st Synthetics; 06-12-2009 at 02:18 PM.
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