Engineered for enthusiasts seeking maximum protection and performance. Precision-formulated with cutting-edge technology and a longstanding devotion to making the world’s best motor oil. The result: engine protection that blows the doors off the highest industry standards.
See the Product Data Bulletin for full details.
1Based on independent testing of AMSOIL Signature Series 0W-20, in ASTM D6891 as required by the API SN specification.
AMSOIL provides better cold cranking viscosity, helping improve wear protection for engine components at startup.PP
| AMSOIL Signature Series(5W-30) | Royal Purple High Performance (5W-30) | Lucas (5W-30) | Driven LS30 (5W-30) | Red Line High Performance (5W-30) | Royal Purple HPS (5W-30) | |
|---|---|---|---|---|---|---|
| Cranking Viscosity (㎫ ●s) | 3800 | 4500 | 5000 | 5750 | 6100 | 6100 |
PPBased on independent third-party testing in the industry-standard ASTM D5293 Cold Crank Simulator test as required by SAE J300.
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75% more engine protection against horsepower loss and wear.A
| Industry Standard | AMSOIL Signature Series 0W-20 Synthetic Motor Oil | |
|---|---|---|
| Average Cam Wear | 90 | 20.28 |
ABased on independent testing of AMSOIL Signature Series 0W-20, in ASTM D6891 as required by the API SN specification.
AMSOIL delivers powerful protection. How good is it? An independent lab compared AMSOIL synthetic motor oil head-to-head against a leading competitor in a 100,000-mile test.P AMSOIL provided far superior wear protection and kept bearings looking like new.
PTesting conducted in an independent lab using AMSOIL Signature Series 5W-30 Synthetic Motor Oil and a leading synthetic-blend 5W-30 motor oil in Ford F-150 trucks with 3.5L twin-turbo engines.
AMSOIL Synthetic Motor Oils achieved 100% protection against LSPI.B
Example of piston damage due to an LSPI event observed during the testing of a competitor’s motor oil. The red arrows indicate sections of the ring land that have broken away from the piston.
BBased on zero LSPI events in five consecutive tests of AMSOIL Signature Series, XL and OE 5W-30 Motor Oil in the LSPI engine test required by the GM dexos1 Gen 2 specification.
Signature Series is barely challenged by the industry-standard testing, demonstrating only a 0.1% viscosity increase. Even when the test length is doubled, AMSOIL delivered twice the viscosity control required by the standard.GG
| Industry Standard | AMSOIL 1X | AMSOIL 2X | |
|---|---|---|---|
| Viscosity Increase % | 100% | 0.1% | 49.6% |
GGBased on independent testing of AMSOIL Signature Series 5W-30 in the Sequence IIIH Engine Test (ASTM D8111), required by the ILSAC GF-6 and API SP specifications.
The oil pick-up tube screen is virtually free of sludge.
LLBased upon independent testing of Mobil 1 Annual Protection Full Synthetic 5W-30 and AMSOIL Signature Series 5W-30 in ASTM D2896. Oils purchased July 2020.
Dvs. AMSOIL OE Motor Oil
DDBased on independent testing of AMSOIL Signature Series 5W-30 in the ASTM D6593 engine test for oil screen plugging as required by the API SN specification.
Protects turbochargers 72% better than requiredC by the GM dexos1* Gen 2 specification.
CBased on independent testing of AMSOIL Signature Series 5W-30 in the GM turbo coking test.
Even after doubling the length of the industry-standard test, AMSOIL delivered 40% cleaner pistons than required by the standard.FF
