AMSOIL SIGNATURE SERIES 0W-30 100% SYNTHETIC MOTOR OIL

AMSOIL Signature Series 0W-30 100% Synthetic Motor Oil delivers maximum wear protection, exceptional cleanliness and extended drain capability for drivers who want more from their motor oil than basic OEM requirements provide.

Modern gasoline engines are increasingly stressed. Turbochargers generate extreme heat in tight spaces. Gasoline direct injection (GDI) creates conditions that promote low speed pre-ignition (LSPI), a phenomenon that can shatter piston ring lands. Stop-and-go driving cycles and extended OEM drain intervals push conventional and lower-tier synthetic oils past their limits, leading to sludge accumulation, deposit buildup and accelerated cam and piston wear. A 0W-30 synthetic motor oil has to handle all of this while still flowing quickly at cold startup temperatures.

75% MORE PROTECTION AGAINST WEAR AND HORSEPOWER LOSS
The Sequence IVA Engine Test (ASTM D6891) simulates extended stop-and-go driving by cycling between idling and elevated rpm for 100 hours, then measuring camshaft wear across 84 locations. The API SN PLUS specification allows up to 90 microns of average cam wear. Signature Series 0W-20, the lightest viscosity in the lineup, scored just 20.28 microns, providing 75% more protection than the standard requires. AMSOIL deliberately tested the lightest grade to increase severity. The 0W-30 builds on this same formulation platform with a strong fluid film that keeps metal surfaces separated and robust anti-wear additives that reduce metal-to-metal contact. In a separate 100,000-mile independent test using Ford F-150 trucks with 3.5L twin-turbo EcoBoost engines, Signature Series 5W-30 kept bearings looking like new and maintained horsepower and torque throughout the entire test duration.

GUARDS TURBOCHARGERS AGAINST COKING
The intense heat turbochargers generate can cause lesser oils to break down and form bearing deposits through a process called turbo coking. Over time, restricted oil flow through the turbo bearing can degrade boost performance or cause outright failure. The GM dexos1 Gen 2 turbo coking test subjects oil to 2,000 extreme heat-soak cycles and requires the oil to limit temperature change within the turbocharger to 13% or less. Signature Series limited that temperature increase to just 3.6%, protecting the turbo 72% better than the specification requires. For vehicles like the Ford F-150 EcoBoost, Chevy Silverado 2.7T, or any turbocharged GDI engine requiring a 0W-30 synthetic oil, this level of thermal stability directly translates to longer turbo life.

100% PROTECTION AGAINST LSPI
Low speed pre-ignition is far more destructive than typical knock. LSPI events can break piston ring lands, and poorly formulated oils are a contributing factor. Signature Series achieved zero LSPI events across five consecutive tests in the engine test required by the GM dexos1 Gen 2 specification. That is a pass rate well beyond what many oils on the market can demonstrate, and it matters for any late-model turbocharged GDI engine where LSPI risk is highest.

KEEPS ENGINES CLEAN WITH 50% MORE DETERGENTS
Signature Series carries 50% more detergent additives than AMSOIL OE Motor Oil, helping keep oil passages clean and promoting consistent oil circulation. In ASTM D2896 testing, Signature Series 5W-30 delivered 28% more acid-neutralizing power than Mobil 1 Annual Protection Full Synthetic 5W-30, with a Total Base Number of 12.5. Higher TBN means more capacity to neutralize acidic combustion byproducts over the full drain interval, which is critical when running extended oil change intervals. In the Sequence VG sludge test, a Ford 4.6L engine was subjected to 216 hours of sludge-inducing conditions. Signature Series produced an oil pick-up tube screen virtually free of sludge, providing 90% better sludge protection than the API SN specification allows.

RESISTS VISCOSITY BREAKDOWN UNDER EXTREME HEAT
The Sequence IIIH Engine Test (ASTM D8111) runs the Chrysler 3.6L Pentastar engine at oil temperatures of 304 degrees F to accelerate thickening and deposit formation. The industry standard allows up to 100% viscosity increase. Signature Series showed just 0.1% viscosity increase after the standard test length. AMSOIL then doubled the test, running the same oil through a second full cycle without a fresh charge. Even at double length, viscosity increase was only 49.6%, well under the single-length limit. Piston cleanliness after the doubled test was 40% better than what the standard requires for a single run. This kind of thermal durability is what separates Signature Series from most synthetic 0W-30 motor oils on the market.

BETTER COLD-WEATHER STARTUP PROTECTION
In ASTM D5293 Cold Crank Simulator testing, Signature Series demonstrated a cranking viscosity of 5,372 mPa·s at -35 degrees C. For comparison, Royal Purple High Performance 5W-30 measured 4,500, Lucas 5W-30 measured 5,000, Driven LS30 measured 5,750, and both Red Line High Performance and Royal Purple HPS 5W-30 measured 6,100 mPa·s. Lower cranking viscosity means faster oil flow to critical engine components at startup, when the majority of engine wear occurs. For cold-climate drivers running a 0W-30 in vehicles like the Honda CR-V, Toyota RAV4, Subaru Outback, or any application calling for an ILSAC GF-6A 0W-30, this translates to real protection during those first critical seconds.

SPECIFICATIONS AND COMPATIBILITY
AMSOIL Signature Series 0W-30 (AZO) meets or exceeds the following specifications: API SP (Resource Conserving), SN PLUS, SN; GM dexos1 Gen 3 (supersedes dexos1 Gen 2, LL-A-025, 6094M and 4718M); ACEA A5/B5, A1/B1; Ford WSS-M2C963-A1; Chrysler MS-6395; ILSAC GF-6A, GF-5, GF-4.

This makes it a direct fit for a wide range of vehicles specifying 0W-30, including GM vehicles requiring dexos1, Ford models calling for WSS-M2C963-A1, and Chrysler/Dodge/Jeep applications requiring MS-6395. It is compatible with other conventional and synthetic motor oils, though mixing will shorten the oil's life expectancy and reduce performance benefits. Aftermarket oil additives are not recommended.

SERVICE LIFE
Normal Service: Up to 25,000 miles, 700 hours of operation, or one year, whichever comes first, in personal vehicles not operating under severe service conditions.

Severe Service: Up to 15,000 miles, 700 hours of operation, or one year, whichever comes first. Severe service includes commercial or fleet vehicles, excessive idling, frequent towing, hauling, plowing, or driving in dusty conditions. Modified engines (non-stock), racing vehicles, and vehicles using alternative fuels (E85, CNG, propane) are excluded from extended drain interval recommendations. Do not exceed 12,000 miles or one year with non-AMSOIL oil filters unless longer intervals are recommended by the vehicle manufacturer. Always change the filter when changing oil. Check oil regularly to maintain proper fill levels.