AMSOIL Gasoline Motor Oil
AMSOIL Signature Series is the top gasoline motor oil in the AMSOIL lineup, built for strong wear protection, clean operation, and dependable performance in demanding service.
Add an AMSOIL Preferred Customer membership to the same cart to unlock up to 25% off qualifying products. Existing members can sign in, and qualifying orders currently over $100 can ship free.
| Product code | Package size | Unit of measure |
|---|---|---|
| AZOQT-EA | Quart | Each |
| AZOQT-CA | Case of 12 Quarts | Case of 12 |
| AZO1G-EA | Gallon Jug | Each |
| AZO55-EA | 55 Gallon Drum | Each |
| AZO27-EA | 275 Gallon Tote | Each |
AMSOIL Signature Series 0W-30 100% Synthetic Motor Oil is a fully synthetic gasoline engine oil engineered for late-model passenger cars, light trucks, and performance vehicles that specify an SAE 0W-30 grade. The formulation meets API SP (Resource Conserving), API SN Plus, GM dexos1 Gen 3, ILSAC GF-6A, ACEA A5/B5 and A1/B1, Ford WSS-M2C963-A1, and Chrysler MS-6395. Signature Series 0W-30 supports drain intervals up to 25,000 miles in normal service.
Signature Series develops a strong fluid film that keeps metal surfaces separated, reinforced by robust anti-wear additives that further reduce wear in metal-to-metal contact regions for maximum engine life. The formula provides 75 percent more engine protection against horsepower loss and wear than required by the industry standard, based on independent testing of Signature Series 0W-20 in the ASTM D6891 Sequence IVA Engine Test required by the API SN specification. The added margin extends the life of vital components such as pistons and cams during long stop-and-go service.
Low-speed pre-ignition (LSPI) is the spontaneous ignition of the fuel and air mixture before the spark fires, and the event is most destructive in turbocharged gasoline direct-injection designs. Signature Series carries an advanced detergent system built to defend against the event and delivers 100 percent protection against LSPI, with zero LSPI events recorded in five consecutive runs of Signature Series, XL, and OE 5W-30 in the LSPI engine test required by the GM dexos1 Gen 2 specification.
Turbochargers create extreme heat at the bearing, which can break weaker oils down and form deposits through turbo coking. The GM Turbo Coking Test puts an oil through 2,000 heat-soak cycles and requires that the temperature change inside the turbocharger stay at 13 percent or less. Signature Series held the increase to 3.6 percent, protecting the turbocharger 72 percent better than required by the GM dexos1 Gen 2 specification, based on testing of Signature Series 5W-30.
Detergency and acid neutralization keep oil passages clean and slow varnish and sludge formation across long drain intervals. Signature Series carries 50 percent more detergents than AMSOIL OE Motor Oil and delivers 28 percent more acid-neutralizing power than Mobil 1, based on independent testing of Mobil 1 Annual Protection Full Synthetic 5W-30 and Signature Series 5W-30 in ASTM D2896 with oils purchased July 2020. The formula also provides 90 percent better protection against sludge in the ASTM D6593 oil screen plugging engine test required by the API SN specification, leaving the oil pick-up tube screen virtually free of sludge.
Cold cranking viscosity governs how quickly oil reaches bearings and cam surfaces during a winter start. The 0W-30 grade posts a cold cranking viscosity of 5,372 cP at -35 degrees Celsius in the ASTM D5293 Cold Crank Simulator test required by SAE J300, supporting reliable startup in cold climates. Once at operating temperature, Signature Series resists viscosity increase, posting only a 0.1 percent gain in the standard-length Sequence IIIH Engine Test (ASTM D8111) required by ILSAC GF-6 and API SP, and 49.6 percent after the test length was doubled, well below the 100 percent industry threshold. The same doubled test produced 40 percent cleaner pistons than the standard requires, based on testing of Signature Series 5W-30. The synthetic base stock also resists oxidation and neutralizes acids over extended drain periods, with a NOACK volatility of 8.8 percent in ASTM D5800 and a total base number of 12.5 in ASTM D2896.
Signature Series 0W-30 is built for gasoline applications that require any of the following specifications: API SP (Resource Conserving), API SN Plus, API SN, GM dexos1 Gen 3 (supersedes dexos1 Gen 2, LL-A-025, 6094M, and 4718M), ACEA A5/B5 and A1/B1, Ford WSS-M2C963-A1, Chrysler MS-6395, and ILSAC GF-6A, GF-5, and GF-4.
AMSOIL Oil Filters are designed for extended drain intervals. With other-brand filters, the interval should not exceed 12,000 miles (19,312 km) or one year unless the vehicle manufacturer recommends a longer interval. The filter should always be changed when the oil is changed, and oil level should be checked regularly. Signature Series 0W-30 is compatible with other conventional and synthetic motor oils, but mixing shortens oil life and reduces performance benefits, and extended drain intervals are not supported when oils have been mixed. Aftermarket oil additives are not recommended for use with AMSOIL synthetic motor oils.
| Property | Value |
|---|---|
| Kinematic Viscosity at 100 C, cSt (ASTM D445) | 10.4 |
| Kinematic Viscosity at 40 C, cSt (ASTM D445) | 57.1 |
| Viscosity Index (ASTM D2270) | 173 |
| CCS Viscosity, cP at -35 C (ASTM D5293) | 5372 |
| Flash Point, C (F) (ASTM D92) | 220 (428) |
| Fire Point, C (F) (ASTM D92) | 238 (460) |
| Pour Point, C (F) (ASTM D97) | -50 (-58) |
| NOACK Volatility, percent weight loss (ASTM D5800) | 8.8 |
| High-Temperature High-Shear Viscosity at 150 C, cP (ASTM D5481) | 3.07 |
| Total Base Number (ASTM D2896) | 12.5 |
Signature Series 0W-30 is available in a quart bottle (product code AZOQT-EA), a case of 12 quarts (AZOQT-CA), a gallon jug (AZO1G-EA), a 55 gallon drum (AZO55-EA), and a 275 gallon tote (AZO27-EA). Using AMSOIL synthetic lubricants does not void a new vehicle or equipment manufacturer warranty, and all AMSOIL lubricants and filters are covered by the AMSOIL Limited Warranty. Match the correct viscosity for the vehicle with the AMSOIL vehicle lookup, compare the Signature Series lineup in the gasoline motor oil products, then order AMSOIL Signature Series 0W-30 100% Synthetic Motor Oil.
I’ve been using AMSoil for so long I don’t remember when I started, but suffice to say I believe it’s the best oil on the market and when paired with the preferred customer membership it’s the the best value too.
Would recommend this to a friend.
The engine seems to run better
Would recommend this to a friend.
First time using this in my 2018 Silverado. So far it appears to be excellent. Quiet and smooth engine running. Will be using this oil exclusively from now on.
Would recommend this to a friend.
0W-30 is an SAE J300 viscosity grade. The 0W rating describes cold-start flow at low temperatures, while the 30 indicates a high-temperature operating viscosity. The grade is widely specified in modern gasoline passenger cars and light trucks that need fast cold flow paired with a stable mid-weight high-temperature film.
The high-temperature 30 grade is the same in both oils. The difference is winter flow: 0W-30 flows more readily at start in cold weather than 5W-30, which can shorten the dry-start period at low ambient temperatures. The owner manual is the authority on which winter grade is allowed in a given engine, since some specifications, such as Ford WSS-M2C963-A1 covered by Signature Series 0W-30, specifically call for an SAE 0W-30.
Many vehicles that specify 5W-30 also allow 0W-30 as an alternative winter grade in cold climates, and Signature Series 0W-30 carries broad backward coverage through API SP (Resource Conserving) and supersession of older GM, Ford, and Chrysler service fills under dexos1 Gen 3. Match the right product with the AMSOIL vehicle lookup before swapping grades.
Signature Series 0W-30 meets API SP (Resource Conserving), API SN Plus, API SN, GM dexos1 Gen 3 (supersedes dexos1 Gen 2, LL-A-025, 6094M, and 4718M), ACEA A5/B5 and A1/B1, Ford WSS-M2C963-A1, Chrysler MS-6395, and ILSAC GF-6A, GF-5, and GF-4.
Drain intervals run up to 25,000 miles (40,200 km), 700 hours, or one year in normal service, and up to 15,000 miles (24,140 km), 700 hours, or one year in severe service. AMSOIL Oil Filters are required for the extended interval.
Yes. Signature Series 0W-30 is a 100 percent synthetic gasoline engine oil paired with a long-drain additive system that resists oxidation and acid buildup over extended intervals.
No. Using AMSOIL synthetic lubricants does not void a new vehicle warranty, and AMSOIL lubricants and filters are covered by the AMSOIL Limited Warranty.