ASTM Motor Oil Comparison Tests Prove AMSOIL Synthetic Motor Oil is Best
In a recent motor oil Comparison AMSOIL Synthetic 10W-30 motor oil (ATM) and 10 other competing conventional and synthetic10W-30 motor oil were subjected to a series of American Society for Testing and Materials (ASTM) motor oil tests. The competing oils included Castro GTX Drive Hard, Mobil Drive Clean, PennzOil with Purebase, Quaker State Peak Performance and Valvoline, as well as synthetic-based Valvoline Synpower, Quaker State, Castrol Syntec, PennzOil and Mobil SuperSyn Multi-Vehicle.
Seven tests were run on the motor oil. The Thin-Film Oxygen Uptake Test (TFOUT) measures the oxidation stability of engine Oil. The High Temperature/High Shear Test (HTHS) measures a lubricant's viscosity under severe operating conditions. The NOACK Volatility Test measures the evaporation loss of oil in high temperature service. Pour Point indicates the lowest temperature at which a fluid will flow. Total Base Number (TBN) is the measurement of a lubricant's reserve alkalinity for combating acids. The Cold Cranking Simulator Test (CCS) measures a lubricant's viscosity at low temperatures and high shear rates. The Four-Ball Wear Test measures a lubricant's wear protection properties. The impressive test results show AMSOIL 10W-30 motor oil outperformed the competitors in each test.
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ASTM D-4172 Four Ball Wear Test, determines the wear protection properties of a lubricant. Three metal balls are clamped together and covered with the test lubricant, while a rotating fourth ball is pressed against them in sliding contact. This contact typically produces a wear scar, which is measured and recorded.
The smaller the average wear scar, the better the wear protection provided by the lubricant. As shown in the graph, AMSOIL 10W-30 Synthetic Motor Oil produced the smallest wear scar of the tested motor oils.
Tests proved AMSOIL 10W-30 (ATM) Synthetic motor oil provides unsurpassed protection against engine wear. Equipment life is extended, less potential repairs, thus downtime and expenses are reduced.
Thin-Film Oxygen Uptake (ASTM-4742)
ASTM-4742 Thin-Film Oxygen Uptake test, evaluates the oxidation stability of the lubricating oil. A mixture of the test oil and chemistries found in gasoline engine operation (oxidized/nitrated fuel, soluble metals and distilled water) placed in a test vessel, which is pressurized with oxygen and placed in a heated bath.
Anti-oxidant breakdown is evident when the oxygen pressure in the vessel rapidly decreases. At this point, the induction time (break point) of the oil is recorded. As shown in the graph, AMSOIL 10W-30 Synthetic motor oil had the highest induction time of all the tested oils. In fact, it did not reach its break point in over 500 minutes of testing at which time they STOPPED the test..
The superior oxidation stability of AMSOIL 10W-30 Synthetic motor oil allows it to resist the formation of engine deposits and sludge, resulting in engines running cleaner and more efficient while extending oil life. It also resists thickening, maintaining its superior wear protection and lubricating properties thus maximizing fuel efficiency.
High Temperature/High Shear (ASTM D-4683)
ASTM D-4683 High Temperature/High Shear Test, measures a lubricant's viscosity under severe high temperature and shear conditions that resemble highly loaded journal bearings in fired internal combustion engines. In order to prevent bearing wear, it is important for a lubricant to maintain its protective viscosity under severe operating conditions. The minimum High Temperature/High Shear viscosity for 30-weight oil is 2.9 cP. As shown in the graph, AMSOIL 10W-30 Synthetic motor oil not only surpasses the minimum standard it displayed the highest High Temperature/High Shear viscosity in the test group.
The superior viscosity retention of AMSOIL 10W-30 Synthetic motor oil in the face of severe temperature and shear conditions in more proof that it provide continuous, unsurpassed protection for engine bearings, extending equipment life and preventing wear.
NOACK Volatility (ASTM D-5800)
ASTM D-5800 NOACK Volatility Test, determines the evaporation loss of lubricants in high temperature service. When motor oil vaporizes, the remaining oil becomes thicker and heavier contributing to poor circulation, reduced fuel economy and increased oil consumption, excessive wear and emissions. A maximum of 15 percent evaporation loss is allowable to meet API SL and ILSAC GF-3 specifications. As shown in the graph, AMSOIL 10W-30 Synthetic motor oil outperformed its nearest competitor by over 30 percent with only a 4.36 % loss.
The extremely low volatility of AMSOIL Synthetic 10W-30 motor oil allows it to maintain its superior protective and performance qualities throughout extended drain intervals, even when faced with severe operating temperatures. In addition, oil consumption and emissions are minimized while fuel efficiency is maximized.
Pour Point (ASTM D-97)
ASTM D-97 Pour Point Test, determines the lowest temperature at which a lubricant will flow when cooled under prescribed conditions. The lower a lubricant's pour point, the better protection it provides in low temperature service. The graph clearly shows, AMSOIL 10W-30 Synthetic motor oil has the lowest pour point of the tested oils.
The low pour point of AMSOIL 10W-30 Synthetic motor oil s allows it to maintain its fluidity in extremely low temperatures, reducing drag on moving vehicle parts, providing critical engine components with quick, essential lubrication and easing startup in cold temperatures. Wear is greatly reduced and equipment life is extended.
Total Base Number (ASTM D-2896)
ASTM D-2896 Total Base Number (TBN) Test, is a measurement of a lubricant's reserve alkalinity, which aids in the control of acids formed during the combustion process. The higher a motor oil's TBN, the more effective it is in suspending wear-causing contaminants and reducing the corrosive effects of acids over an extended period of time. As shown in the graph, AMSOIL Synthetic 10W-30 motor oil has the highest TBN of the tested Oil.
The high TBN of AMSOIL Synthetic 10W-30 motor oil allows it to effectively combat wear-causing contaminants and acids, providing superior protection and performance over extended drain intervals.
Cold Crank Simulator (ASTM D-5293)
ASTM D-5293 Cold Crank Simulator Test, determines the apparent viscosity of lubricants at low temperatures and high shear rates.
Viscosity of lubricants under these conditions directly relate to engine cranking and start-ability. The lower a lubricant's cold crank viscosity, the easier an engine will turn over in cold temperatures.
10W motor oil tested at -25C and must have a viscosity below 7000 cP to pass. As shown in the graph, AMSOIL Synthetic 10W-30 motor oil is well below the maximum requirement, while many of the competing Oil barely pass.
The low cold crank viscosity of AMSOIL Synthetic 10W-30 motor oil reduces drag on moving engine parts and allows engines to achieve critical cranking speed in extremely frigid temperatures. Engines turn over quickly and dependably in the coldest winter temperatures.
Four Ball Wear (ASTM D-4172)