AMSOIL 10W-30 Synthetic motor oil (ATM)
AMSOIL Synthetic motor oil 10W-30 performed three times better than the test limit in the area of kinematic viscosity increase, plus it excelled in all other areas of the testing
AMSOIL 10W-30 Synthetic motor oil (ATM) Excels in API ASTM Sequence III Test which is a stringent API SL, ILSAC GF-3 test that has been used by the oil industry for over 45 years. This test is designed to measure motor 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. The current AMSOIL 10W-30 motor oil specifications are API SM/CF, SL, SJ , ILSAC, GF-4, 3 ,ACEA A1/B1, A5/B5, JASO VTW, GM 4718M, 6094M, Ford WSS-M2C205-A, Daimler Chrysler MS-6395N, VW 503.00
OBJECTIVE
Subject AMSOIL 10W-30 Synthetic Motor Oil (ATM) to an independent API test using the ASTM Sequence III Test to determine its effectiveness in preventing deposit formation and providing wear protection in high temperature conditions.
SPECIAL CONDITIONS
Because AMSOIL 10W30 Synthetic motor oil is formulated to provide superior performance over extended drain intervals, testing was allowed to continue for 240 straight hours, which is three times the length of the standard ASTM Sequence III test.
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TEST PROCEDURE
Testing is conducted with a 1996 model Buick 3800 Series II, water-cooled, four-cycle, V-6 engine. The test engine is an overhead valve design (OHV) with a single camshaft operating the intake and exhaust valves through pushrods and hydraulic valve lifters in a slider-follower arrangement, and it has one intake and one exhaust valve per cylinder. Induction is performed through a modified GM port fuel injection system with the air-to-fuel ratio set to 15:1.
Running unleaded gasoline, testing begins with a 10-minute initial Oils 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 Oils temperature for 80 hours with Oils 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 Oils screen plugging is evaluated.
TEST RESULTS
Even at three times the standard test length, AMSOIL 10W-30 Synthetic Motor Oil (ATM) 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 Synthetic motor oil kept viscosity increase, wear, deposits and varnish to a minimum. The pictures below demonstrate the superior protection provided by AMSOIL 10W-30 (ATM) Synthetic motor oil throughout 240 straight hours of ASTM Sequence III testing.
While conventional motor oil tends to thicken and lose their lubricating effectiveness, AMSOIL 10W-30 Synthetic motor oil maintained the required viscosity over the extended drain intervals. The results of the ASTM Sequence III test clearly demonstrates the long drain capability of AMSOIL 10W-30 Synthetic motor oil . Even after being subjected to a triple length Sequence III test, AMSOIL 10W-30 Synthetic motor oil performed three times better than the standard test limits. The competitor's motor oils shows dramatic viscosity increase in less than half the time.
The greatest overall load concentration and stress are placed on the piston skirts and rings on the thrust sides of the pistons as they move down, contributing to heavier deposits than the anti-thrust sides. Even after being subjected to the Sequence III test for three times the standard test length, the pistons (above) lubricated by AMSOIL 10W-30 Synthetic motor oil show minimal deposits and varnish. In fact, upon close inspection, the original piston machine markings are still visible on both sides of the pistons. This superior protection provided by AMSOIL Synthetic motor oil extend the lives of both old and new vehicles, even in severe driving conditions.
Even at three times the standard Sequence III test length, the Oils pan, screen and valves showed no signs of deposits, oxidation or plugging. By keeping engines clean and deposit-free, AMSOIL Synthetic motor oils effectively reduce wear and keep engines running smoothly for extended drain intervals.