The size of the scar as a result of the test indicates the level of wear protection the lubricant provides. To better differentiate between lubricants, the severity of the test was increased with higher rpm and temperature (the test standard allows for running the test under modified parameters). The user of this test method should determine to his own satisfaction whether results of this test procedure correlate with field performance or other bench test machines.Īlthough not widely used as an engine oil test, the Four-Ball Wear Test provides a means of comparing relative wear-protection properties of lubricating oils. No attempt has been made to correlate this test with balls in rolling contact. Bench tests are used widely to differentiate between formulations.įour-Ball Wear Test (ASTM d4172 Mod.): According to the ASTM, the Four-Ball Wear Test can be used to determine the relative wear preventive properties of lubricating fluids in sliding contact under the prescribed test conditions. Methodology: Laboratory bench testing conducted in accordance with American Society of Testing and Materials (ASTM) procedures examined several important areas of motor oil performance, including resistance to deposit formation, wear protection, high-temperature stability, resistance to acid formation and cold-temperature performance. For detailed test results visit 2016 5W30 Oil Comparison TEOST 33c Update: In 2016 AMSOIL subjected Royal Purple 5W30, Mobil1 Extended Performance 5W30 and AMSOIL signature series 5W30 to ASTM TEOST 33c test.
Objective: Compare the performance in laboratory tests and cost-effectiveness of AMSOIL Signature Series Synthetic Motor Oil to several passenger-car/light-truck synthetic motor oils widely considered by marketers and con- sumers to be the best available. Note: All Tests are Performed by Independent ASTM Lab
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