Amsoil Signature Series 0W-30 AZO is designed for enthusiasts looking for the best performance and protection. Precision-formulated using cutting-edge technology and a lifelong commitment to creating the best motor oil in the world. The end result is engine protection that surpasses even the highest industry benchmarks.
The industry norm is exceeded by 75%, protecting the engine against horsepower loss and wear1 and increasing the lifespan of crucial parts like pistons and cams. Creates a solid fluid film that maintains the separation of metal surfaces. For optimal engine life, powerful anti-wear additives further decrease wear in metal-to-metal contact areas.
1Based on independent testing of AMSOIL Signature Series 0W-20, in ASTM D6891 as required by the API SN specification.
Signature Series Fights Wear
75% more engine protection against horsepower loss and wear.A
ABased on independent testing of AMSOIL Signature Series 0W-20, in ASTM D6891 as required by the API SN specification.
Signature Series Fights Viscosity Breakdown
AMSOIL outperforms the competitionO at preventing viscosity breakdown, offering enhanced protection for bearings, cams, and pistons.
OBased upon independent testing of Mobil 1 Annual Protection Full Synthetic 5W-30, Schaeffer’s Supreme 9000 5W-30, Lucas Synthetic 5W-30, Valvoline Conventional Daily Protection 5W-30, Pennzoil 5W-30 and AMSOIL Signature Series 5W-30 in the Kurt Orbahn test. Oils purchased on 05/03/18.
Signature Series Delivers Powerful Protection
AMSOIL offers effective defense against engine wear. How effective is it? In a 100,000-mile test, an independent lab pitted AMSOIL synthetic motor oil against a top rival.PAMSOIL gave significantly better wear protection and retained bearings in brand-new condition.
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.
Signature Series Protects Against LSPI
100% LSPI protection was achieved by AMSOIL Synthetic Motor Oils.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 Resists Viscosity Increase
The industry-standard testing hardly challenges the Signature Series, which shows a viscosity rise of just 0.1 percent. Even with the test length being doubled, AMSOIL still provided the standard with twice as much viscosity control.GG
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
Keeps Engines Clean
Formulated with superior thermal durability that resists breakdown and keeps pistons clean.
Controls heat and minimizes performance-robbing deposits.
Maximizes engine life and performance.
Helps Keep Engines Cleaner
Signature Series is fortified with a heavy treatment of detergent additives, delivering 28 percent more acid-neutralizing power than Mobil 1* and helping engines stay cleaner, longer.LL
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.
Signature Series Guards Turbos
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.
Signature Series Cleans
Signature Series has 50% more detergentsD to help keep oil passages clean and promote oil circulation. It provides 90% better protection against sludge.DD
The oil pick-up tube screen is virtually free of sludge.
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.
Signature Series Neutralizes Acids
AMSOIL Signature Series is fortified with a heavy treatment of detergent additive and it delivers 30% more acid neutralizing powerE than Mobil 1,* and 36% more than Royal Purple,* helping engines to stay cleaner, longer.
EBased on independent Mobil 1 Annual Protection 5W-30, Schaeffer's Supreme 9000 Full Synthetic 5W-30, Royal Purple High Performance 5W-30, Pennzoil Platinum Full Synthetic 5W-30, Pennzoil 5W-30, Royal Purple High Performance 5W-30, In accordance with ASTM D2896, Valvoline Signature Series 5W-30, Lucas Synthetic 5W-30, Valvoline Full Synthetic Modern Engine 5W-30, and Valvoline Conventional Daily Protection 5W-30 testing. Oils bought on May 3, 2018.
Signature Series Helps Keep Valves Clean
As a result, oil consumption is decreased and valves are kept clean. AMSOIL combats volatilityU 38 percent better than Mobil 1* and 17 percent better than Royal Purple*.
UBased on independent testing of AMSOIL Signature Series Synthetic 5W-20, Mobil 1Advanced Synthetic 5W-20, Royal Purple High Performance Synthetic 5W-20, Valvoline* Advanced, Pennzoil Platinum, Valvoline High Mileage, Mobil 1* Annual Protection, Schaeffer’s* Supreme 9000, Lucas* Oil, Pennzoil (conventional) and Valvoline* Daily Protection (conventional) in ASTM D5800. Oils purchased October-November 2018.
Keeps Pistons Cleaner
Even after doubling the length of the industry-standard test, AMSOIL delivered 40% cleaner pistons than required by the standard.FF
FFBased 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.
Trusted by Professionals
Dedicated technicians and engine builders spend a lot of time perfecting their trade. To safeguard their passion, these designers of strong, high-performance engines rely on AMSOIL Signature Series.
