09 Mar AMSOIL SIGNATURE SERIES SYNTHETIC MOTOR OIL EXCELS IN DOUBLE-LENGTH PERFORMANCE TEST
Signature Series once again raises the bar for motor oil performance
The sequence IIIG Engine Test (ASTMD7320) is designed to evaluate automotive motor oils for oil thicken
ing, piston deposits, oil consumption and engine wear during moderately high-speed, high-temperature service. It must be passed for motor oil to meet the API SN and ILSAC GF-5 motor oil specifications. Results in the 100-hour test are an important indicator of how well a motor oil will perform in real-world service.
Double-Length Test
Signature Series has historically performed well in this test, AMSOIL decided to push the envelope and subject the oil to a double-length (200-hour) Sequence IIIG Engine Test. Signature Series 5W-30 Synthetic Motor Oil not only passed the double-length test, it did so with flying colors. Results show the oil delivered outstanding wear protection, deposit control and oxidative stability after 200 hours of testing. AMSOIL is not aware of another motor oil that has passed a double-length Sequence IIIG Engine Test. The complete results are available in the new Sequence IIIG Technical Study (G3320).
What it Means to Motorists
Modern engines demand increased performance from motor oil. Turbochargers, direct fuel injection, variable valve timing and other advancements improve fuel economy and performance, but result in increased operating temperatures, pressures and contaminants, while increasing the likelihood of viscosity loss due to mechanical shear. Motor oil today must guard against the negative effects of added stress for today’s sensitive engine systems to function as designed.
While not all motor oils may be up to the challenge, these test results prove that Signature Series offers exceptional protection against harmful:
• deposits,
• viscosity increases
• wear
in the toughest conditions, helping motorists maximize the performance and longevity of their vehicles. Its ability to keep components clean despite increased stress helps sophisticated engine systems operate smoothly and demonstrate long life. Signature Series’ outstanding performance combined with its extended-drain capabilities offer a unique combination of quality and value not offered by other motor oils.
Cam & Lifters After Double-Length Sequence IIIG Engine Test
Results
The camshaft and lifter wear values provide a measure of the anti-wear quality of the oil under conditions of high-pressure mechanical contact. Even after 200 hours of testing, Signature Series Synthetic Motor Oil limited wear well below the maximum allowable, providing excellent wear protection.
Below are API SN/ILSAC GF-5 Amsoil Signature Amsoil Signature
the results Requirement after Series after Series after
of this test 100 Hrs. 100 Hrs. 200 Hrs.
Average Cam plus 60 (maximum) 14.8 17.6
Lifter Wear (microns)
Results
A rating of 5.5 for piston deposits after 100 hours of testing is commonly considered outstanding, while motor oils must earn a minimum 4.0 rating to meet the API SN/ILSAC GF-5 motor oil specification. Even after 200 hours of testing, Signature Series limited deposits and earned ratings well above the minimum threshold. Signature Series demonstrated excellent thermal stability and cleanliness properties, easily passing the double-length test.
Below are API SN/ILSAC GF-5 Amsoil Signature Amsoil Signature
the results Requirement after Series after Series after
of this test 100 Hrs. 100 Hrs. 200 Hrs.
Average piston Deposit (ratings) 4.0 (minimum) 7.70 7.42