AMSOIL 100% Synthetic 10W-30 Oil Excels in API Sequence IIIF Test

When it comes to additives AMSOIL spares no expense, they select the most robust additive packages on the market. These premium additives keep AMSOIL synthetic oils shear stable, resist the degrading effects of varnish and sludge, keep engine components clean and deposit-free and effectively resist rust, corrosion and foaming.

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. AMSOIL Synthetic Oil will save you money. Industry testing shows fuel economy increases of 5% and more using AMSOIL Synthetic Oil. Other benefits include lower emissions, reduced engine wear, fewer repairs, and an engine that lasts longer. Less friction in the engine from AMSOIL Synthetic Oil gives your vehicle these benefits.

OBJECTIVE
Subject AMSOIL 10W-30 Synthetic Motor Oil (ATM) to an independent API Sequence IIIF Test to determine its effectiveness in preventing deposit formation and providing wear protection in high temperature conditions.

SPECIAL CONDITIONS
Because AMSOIL is formulated to provide superior performance over extended drain intervals, testing was allowed to continue for 240 straight hours, three times the length of the standard Sequence IIIF test.

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 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.

Sequence IIIF
Test Parameters

AMSOIL 10W-30 (ATM)
Triple Length (240 hr.)

API SL Limits
(80 hr.)

Kinematic Viscosity, % Increase at 40° C

90.42

275 max.

Weighted Piston Deposit Rating

4.51

4.0 min.

Average Piston Skirt Varnish Rating

9.50

9.0 min.

Cam Plus Lifter Wear Average µm

11.8

20 max.

Hot Stuck Rings

0

None

AMSOIL Synthetic Oil will save you money. Industry testing shows fuel economy increases of 5% and more using AMSOIL Synthetic Oil. Other benefits include lower emissions, reduced engine wear, fewer repairs, and an engine that lasts longer. Less friction in the engine from AMSOIL Synthetic Oil gives your vehicle these benefits.

AMSOIL Synthetic Oil will save you money. Industry testing shows fuel economy increases of 5% and more using AMSOIL Synthetic Oil. Other benefits include lower emissions, reduced engine wear, fewer repairs, and an engine that lasts longer. Less friction in the engine from AMSOIL Synthetic Oil gives your vehicle these benefits.

AMSOIL Synthetic Oil will save you money. Industry testing shows fuel economy increases of 5% and more using AMSOIL Synthetic Oil. Other benefits include lower emissions, reduced engine wear, fewer repairs, and an engine that lasts longer. Less friction in the engine from AMSOIL Synthetic Oil gives your vehicle these benefits.

Even at three times 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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AMSOIL Synthetic Oil will save you money. Industry testing shows fuel economy increases of 5% and more using AMSOIL Synthetic Oil. Other benefits include lower emissions, reduced engine wear, fewer repairs, and an engine that lasts longer. Less friction in the engine from AMSOIL Synthetic Oil gives your vehicle these benefits. AMSOIL Synthetic Oil will save you money. Industry testing shows fuel economy increases of 5% and more using AMSOIL Synthetic Oil. Other benefits include lower emissions, reduced engine wear, fewer repairs, and an engine that lasts longer. Less friction in the engine from AMSOIL Synthetic Oil gives your vehicle these benefits.

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 IIIF test for three times the standard test length, the pistons (above) lubricated by AMSOIL 10W-30 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 Motor Oils extends the lives of both old and new vehicles, even in severe driving conditions.

TEST RESULTS
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. The pictures below demonstrate the superior protection provided by AMSOIL Motor Oil throughout 240 straight hours of Sequence IIIF testing.

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.

REDUCE SKYROCKETING GAS COSTS WITH AMSOIL SYNTHETIC OIL! IT'S MORE IMPORTANT THAN EVER TO REDUCE OUR DEPENDANCE ON MIDDLE EAST OIL!
AMSOIL Synthetic Oil gives a 5% increase in fuel economy on average, and in some cases even more! Why use ordinary conventional oils when our superior AMSOIL synthetic oils outperform the others? AMSOIL Synthetic Oil is USA made. AMSOIL Synthetic Oil has superior lubrication, extends your engine life by reducing friction and wear and creates more torque and horsepower.
Help reduce our dependency on foreign oil! Use AMSOIL Synthetic Oil.
Find out how AMSOIL can increase your fuel economy!

"AMSOIL Syntheitc Oil is the Best Lubricant made, the Standard by which all others are judged."...Bobby Unser, 3-time Indy 500 Winner, 35 overall Indy Car wins, and 13-time Pikes Peak Hill Climb Winner.