AMSOIL OE 5W-20 100% Synthetic Motor Oil

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AMSOIL OE 5W-20 100% Synthetic Motor Oil

AMSOIL OE 5W-20 100% Synthetic Motor Oil is a fully synthetic gasoline engine oil engineered for late-model passenger cars and light trucks that specify an SAE 5W-20 grade. The formulation meets API SQ (Resource Conserving), API SP, and API SN Plus, plus GM dexos1 Gen 3, Chrysler MS-6395, multiple Ford WSS-M2C specifications, and ILSAC GF-7A, GF-6A, and GF-5. OE 5W-20 is the value-tier choice for mechanics and drivers who follow the original equipment manufacturer drain interval and want 100 percent synthetic protection for turbocharged and direct-injection engines.

Advanced wear protection for modern engines

Smaller displacement gasoline engines run hotter and use lower viscosity grades, which puts more load on the oil film around pistons, cams, and bearings. Camshaft wear can result in poor valve timing, lost engine efficiency, and expensive repairs. OE 5W-20 carries an additive system built to hold a strong film under sustained high-stress operation, providing 47 percent more wear protection than the GM dexos1 Gen 2 specification requires, based on independent testing of OE 0W-20 in the 100-hour Peugeot TU3M Wear Test (CEC L-38-A-94) required by dexos1 Gen 2.

LSPI defense for turbocharged direct-injection engines

Low-speed pre-ignition (LSPI) is a damaging combustion event in which the fuel and air mixture ignites before the spark fires, and it is most common in turbocharged gasoline direct-injection (GDI) engines under heavy load at low rpm. Unchecked LSPI can destroy pistons and connecting rods. OE 5W-20 uses a chemistry developed specifically to suppress these events. Independent testing of AMSOIL OE 5W-30 in the LSPI engine test required by the GM dexos1 Gen 2 specification recorded zero LSPI occurrences across five consecutive runs, achieving 100 percent protection.

Detergent loading and deposit control

OE 5W-20 starts with 100 percent synthetic base oils that naturally resist chemical breakdown, then layers in a detergent and dispersant additive package built to suspend soot, fuel dilution byproducts, and partially burned fuel before they form varnish or sludge. The Total Base Number of 8 (ASTM D2896) gives the formulation reserve alkalinity to neutralize acids over the drain interval, helping the engine run cleanly and reliably between oil changes.

Cold-start flow and thermal stability

Synthetic base oils stay fluid in cold weather, which helps the oil reach bearings, lifters, and cam surfaces faster at startup. OE 5W-20 posts a Cold Crank Simulator viscosity of 4586 cP at -30 C (ASTM D5293) and a pour point of -46 C (ASTM D97), keeping pumpability strong in freezing climates. Once the engine reaches operating temperature, the formulation controls heat to limit deposit formation, prevent thickening, and slow oil consumption, with a NOACK volatility of 7.3 percent weight loss (ASTM D5800) that lowers vaporization losses through the PCV system.

API SP licensing, fuel economy, and emissions compatibility

OE 5W-20 is licensed by the American Petroleum Institute (API) to meet API SQ (Resource Conserving), API SP, and API SN Plus, and it carries the additional Resource Conserving designation that signals fuel-economy improvement over a reference oil. The formulation is friendly toward modern emissions-control hardware, supporting proper operation of catalytic converters and three-way emission systems for long service life and low exhaust emissions.

Recommended applications and service intervals

OE 5W-20 is built for gasoline passenger-car and light-truck applications that require any of the following specifications: API SQ (Resource Conserving), SP, SN Plus; GM dexos1 Gen 3 (supersedes dexos1 Gen 2 and 6094M); Chrysler MS-6395; Ford WSS-M2C945-B1, WSS-M2C945-A, WSS-M2C930-A, WSS-M2C960-A1, and WSS-M2C970-A1; and ILSAC GF-7A, GF-6A, and GF-5. Always confirm the correct SAE viscosity for the application with the owner manual before ordering.

• Normal gasoline-vehicle service: follow the drain interval stated by the vehicle manufacturer or indicated by the oil life monitoring system.
• Filter change: change the oil filter at every oil change, and check oil level regularly between services.
• Excluded service: aftermarket oil additives are not recommended for use with OE 5W-20, and mixing with other oils shortens performance benefits.
• Outside the United States and Canada: follow the vehicle manufacturer recommended drain interval for the local market.

OE 5W-20 is compatible with other synthetic and conventional motor oils, but mixing shortens oil life and reduces performance benefits, and extended drain intervals are not supported when oils have been mixed. For pickups and SUVs that run heavy loads, tow regularly, or operate in dusty environments, AMSOIL Signature Series in the same SAE grade is the extended-drain alternative.

Typical technical properties

Order AMSOIL OE 5W-20

OE 5W-20 is available as a quart bottle (product code OEMQT-EA), case of 12 quarts (OEMQT-CA), gallon jug (OEM1G-EA), 55 gallon drum (OEM55-EA), and 275 gallon tote (OEM27-EA). Using AMSOIL synthetic lubricants does not void a new vehicle or equipment manufacturer warranty, and OE Motor Oil is Warranty Secure and backed by the AMSOIL Limited Warranty. Match the right grade for the vehicle with the AMSOIL Vehicle Lookup Guide, compare gasoline motor oil families in the Car Oil Guide, then order AMSOIL OE 5W-20 100% Synthetic Motor Oil.

Frequently asked questions