Synthetic oil outperforms conventional motor oils in cars, trucks, recreational vehicles, marine outboard motors and even lawn mowers—anything that has an engine. Synthetic oils are engineered from chemical compounds. But not all synthetic oils are created equal. Each manufacturer of synthetic oil, including AMSOIL, has its own formulations.

Blended oils

Conventional petroleum products can be blended with synthetic oils to improve performance in your vehicle and cut down on sludge and generally improve performance. This is less expensive than 100% synthetic oils but blends are usually not as effective for preventing wear and the build-up of residue, and do not last as long.

The difference

Chemically modified base oil components are used as base oils instead of crude oil. Various manufacturers select different base oils and additive packages. One goal of this choice, after testing and research by chemists, is to develop a formulation that will keep your engine clean. Other factors like wear protection, rust and corrosion protection, and additive compatibility are also considered. These decisions are usually based upon the trade-off between performance, protection and cost. You want the oil that gives you optimum performance by extending the life of your vehicle.

The oil must undergo stringent ASTM tests to evaluate performance, durability and minimum performance specifications. One of these tests is called a Sequence IIIG Engine Test (ASTM D7320). The Sequence IIIG Engine Test is designed to evaluate automotive engine oils for high-temperature performance, including oil thickening, piston deposits, oil consumption and engine wear during moderately high-speed, high-temperature service. The test criteria require a 100-hour test after which the engine is disassembled and rated and the oil is analyzed.

AMSOIL 5W-30 Signature Series Synthetic Motor Oil was tested using a 200-hour Sequence IIIG engine test, two times the required test length, for performance evaluation. Signature Series 5W-30 Synthetic Motor Oil not only met but exceeded API SN/ILSAC GF-5 performance requirements despite the severe nature of the double-length Sequence IIIG Engine Test. Values for piston deposits, hot-stuck rings, cam-plus-lifter wear and viscosity increase remained well within the requirements after 100 hours of testing. Even after doubling the test interval to 200 hours, the oil easily met all requirements and delivered excellent performance. Results demonstrate that Signature Series provides outstanding engine protection and cleanliness in today’s hot-running, sophisticated engines. Synthetic oil products must meet certain specifications to pass the test. No other brand of engine oil provides this high level of protection and performance.

Click here for a detailed analysis and PDF copy of the Sequence IIIG Engine Test (ASTM D7320).

The results indicated that the Signature Series oil products offered 75% better engine protection than conventional oils. This included better fuel economy.

Test results also showed:

• Superior oxidation resistance
• Outstanding temperature range
• Excellent fluidity

Vehicles using synthetic motor oils start better in cold weather. The superior flow characteristics at lower temperatures results in engine oil heating up faster, and reducing friction and wear. Increased fuel economy is also an added benefit.

Different vehicles

In 1972, AMSOIL introduced the world’s first synthetic 10W-40 motor oil, recommended for 25,000 miles or 1 year. Synthetic oils are used today in the newer, more efficient engines. Many vehicles today require synthetic oil and are factory-filled with synthetic oil from the factory.

AMSOIL also produces synthetic oils for use with all types of diesel-equipped vehicles.

Synthetic oils reduce engine maintenance. Vehicles with recommended oil changes of 3,000 miles can now function for 10,000 to 25,000 miles without an oil change using AMSOIL. This results in less used oil dumped in disposal sites.

Additional products

AMSOIL produces synthetic lubrication products for all vehicles including diesel engines, transmissions and differentials. Synthetic oil is also used for industrial machinery. You will find these products at The Best Oil  at factory direct discount prices. AMSOIL builds to quality; other companies build to cost.