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AMSOIL 10W-30 Excels in API Sequence IIIF Test
The Sequence IIIF test is a stringent API SL, ILSAC GF-3 test designed to measure oil thickening and piston deposits in high temperature service, as well as provide information on valve train wear. The test is designed to emulate high-speed service under high ambient conditions.
Running unleaded gasoline, testing begins with a 10-minute initial oil leveling procedure before slowly working its way up to test speed, temperature and load conditions. Testing continues at 100 bhp, 3600 rpm and 155 C oil temperature for 80 hours with oil checks performed every 10 hours. Kinematic viscosity increase and wear metals (Cu, Pb and Fe) are evaluated at every 10-hour interval.
At the end of 80 hours, all six pistons are inspected for deposits and varnish, camshaft and lifters are measured for wear and oil screen plugging is evaluated.
Even at three times the standard test length, AMSOIL 10W-30 performed three times better than the test limit in the area of kinematic viscosity increase, and it excelled in all areas of the test.
AMSOIL 10W-30 Motor Oil kept viscosity increase, wear, deposits and varnish to a minimum.
While conventional motor oils tend to thicken and lose their lubricating effectiveness, AMSOIL Motor Oils are formulated to maintain their viscosities over extended drain intervals.
The results of the Sequence IIIF test clearly demonstrate the long drain capability of AMSOIL 10W-30 Motor Oil. Even after being subjected to a triple length Sequence IIIF test, AMSOIL 10W-30 performed three times better than the standard test limits. The competitor's motor oil shows dramatic viscosity increase in less than half the time.
Even at three times the standard Sequence IIIF test length, the oil pan, screen and valves showed no signs of deposits, oxidation or plugging. By keeping engines clean and deposit-free, AMSOIL Motor Oils effectively reduce wear and keep engines running smoothly for extended drain intervals.
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