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.
Fights Engine Wear
75 percent more engine protection against horsepower loss and wear1 than required by the industry standard, extending the life of vital components like pistons and cams.
Develops a strong fluid film that keeps metal surfaces separated.
Robust anti-wear additives further reduce wear in metal-to-metal contact regions for maximum engine life.
Signature Series Fights Wear
75% more engine protection against horsepower loss and wear
Signature Series Fights Viscosity Breakdown
AMSOIL fights viscosity breakdown better than the competition, providing superior protection of pistons, cams and bearings.
Signature Series Delivers Powerful Protection
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.
Signature Series Protects Against LSPI
AMSOIL Synthetic Motor Oils achieved 100% protection against LSPI
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.
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.
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.
Signature Series Helps Keep Valves Clean
AMSOIL fights volatilityU 38% better than Mobil 1* and 17% better than Royal Purple,* helping reduce oil consumption and keep valves clean.
Keeps Pistons Cleaner
Even after doubling the length of the industry-standard test, AMSOIL delivered 40% cleaner pistons than required by the standard.
Use AMSOIL Signature Series Synthetic Motor Oil in applications
that require any of the following specifications:
0W-20 (ASM): API SP (Resource Conserving), SN PLUS, SN...; GM dexos1 Gen 2 (super-
sedes 6094M); ACEA A1/B1; Ford WSS-M2C947-B1, WSS-M2C947-A; Chrysler MS-6395;
ILSAC GF-6A, GF-5, GF-4
5W-20 (ALM): API SP (Resource Conserving), SN PLUS, SN...; GM dexos1 Gen 2 (super-
sedes 6094M); ACEA A1/B1; Ford WSS-M2C945-B1, WSS-M2C945-A, WSS-M2C930-A;
Chrysler MS-6395; ILSAC GF-6A, GF-5, GF-4
0W-30 (AZO): API SP (Resource Conserving), SN PLUS, SN...; GM dexos1 Gen 2 (su-
persedes LL-A-025, 6094M and 4718M); ACEA A5/B5, A1/B1; Chrysler MS-6395; ILSACGF-6A, GF-5, GF-4
5W-30 (ASL): API SP (Resource Conserving), SN PLUS, SN...; GM dexos1 Gen 2
(supersedes LL-A-025, 6094M and 4718M); ACEA A5/B5, A1/B1; Honda HTO-06; Ford
WSS-M2C946-B1, WSS-M2C946-A, WSS-M2C929-A; Chrysler MS-6395; ILSAC GF-6A,
10W-30 (ATM): API SP (Resource Conserving), SN PLUS, SN...; ACEA A5/B5, A1/B1;
Ford WSS-M2C205-A; Chrysler MS-6395; GM LL-A-025, 6094M, 4718M; ILSAC GF-6A,
0W-40 (AZF): API SP, SN PLUS, SN...; Chrysler MS-12633, MS-10725, MS-10850;
5W-50 (AMR): API SP, SN PLUS, SN...; Ford WSS-M2C931-C (Mustang)