HE SEQUENCE IIIG ENGINE TEST (ASTM D7320) is designed to evaluate automotive motor oils for oil thickening, 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.
Because Signature Series has historically performed well in the 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.