AMSOIL 5W-30 100% Synthetic High-Mileage Motor Oil

Available sizes

AMSOIL 5W-30 100% Synthetic High-Mileage Motor Oil

AMSOIL 5W-30 100% Synthetic High-Mileage Motor Oil (HM530) is engineered for gasoline engines that have already crossed 75,000 miles and need a more robust maintenance lubricant than a standard 5W-30. The formulation pairs synthetic base oils with boosted detergency, anti-wear additives, and a higher dose of seal conditioners to fight deposits, control oil consumption, and help stop the small leaks that show up as engines age. HM530 is a strong fit for older sedans, SUVs, and light trucks that originally specified a 5W-30 grade and that drivers plan to keep on the road for many more years.

Engine cleanliness for higher-mileage engines

Deposits and sludge reduce engine performance and efficiency as miles add up on a vehicle. HM530 delivers enhanced detergency that helps remove deposit buildup and restore peak performance in dirty engines. Cleaning power is demonstrated in the modified Sequence VH test, where 100% Synthetic High-Mileage Motor Oil reduced sludge by 67 percent, based on independent testing of the 0W-20 viscosity in the modified Sequence VH Test (ASTM D8256). Further proof shows up in the TEOST 33C deposit test, where High-Mileage Motor Oil delivered up to 62 percent better deposit prevention than two leading high-mileage competitors, based on independent testing of the 0W-20 viscosity in the TEOST 33C Test (ASTM D6335) required by the ILSAC GF-6 specification against Valvoline Full Synthetic High-Mileage with MaxLife Technology 0W-20 and Mobil 1 High Mileage 0W-20 Full Synthetic Motor Oil.

Boosted seal conditioners for leak protection

Oil leaks are an inconvenience and, if left unchecked, can lead to lack of lubrication and engine failure. HM530 carries a boosted dose of seal conditioners that revitalize aging crankshaft seals, valve cover gaskets, and oil pan seals so the rubber stays pliable and the joint stays sealed. The result is a 5W-30 that helps stop the slow oil weep that often appears on driveways and parking pads on engines past the 75,000 mile mark.

Oil-consumption control

Oil consumption is often an issue in high-mileage vehicles, where worn cylinder walls and tired piston rings can let small amounts of oil reach the combustion chamber. HM530 is thermally stable across a wide range of temperatures and resists volatility, with a NOACK weight loss of 8.5 percent by the ASTM D5800 method. Lower volatility means less of the lighter fractions are boiled off during sustained highway runs or hot stop-and-go traffic, which helps keep the dipstick reading where it belongs between oil changes.

Durable viscosity and consistent film thickness

Engines can lose compression as cylinders and piston rings wear, which leads to reduced horsepower and rougher idle. Maintaining a consistent fluid film helps counteract compression loss by sealing combustion chambers and keeping moving parts apart. HM530 holds an SAE 5W-30 grade with a kinematic viscosity of 11.1 cSt at 100 C and a high-temperature high-shear viscosity of 3.3 cP at 150 C by the ASTM D5481 method, so the protective film stays in place during hot operation, towing, and sustained highway loads.

API SP licensed protection for the engines on the road today

HM530 is licensed by the American Petroleum Institute and meets the categories listed in current owner manuals for 5W-30, including API SQ, API SP, and API SN Plus. The formulation also meets ILSAC GF-7A, GF-6A, and GF-5, plus GM dexos1 Gen 3 (which supersedes dexos1 Gen 2, GM 4718M, and GM 6094M), Chrysler MS-6395, and Ford WSS-M2C929-A, WSS-M2C946-A, WSS-M2C946-B1, WSS-M2C961-A1, and WSS-M2C971-A1. The license backs the formulation through the API Engine Oil Licensing and Certification System and confirms its performance against industry wear, deposit, and emissions-system tests.

Recommended applications and service intervals

HM530 is built for gasoline-fueled cars, light trucks, SUVs, and vans that specify a 5W-30 viscosity and that have accumulated higher mileage. Match the right grade for the vehicle with the AMSOIL Vehicle Lookup Guide before ordering, and compare AMSOIL 5W-30 families in the 5W-30 Oil Guide.

• Normal Service: up to 12,000 miles or one year, whichever comes first, in personal vehicles not operating under severe service.
• Severe Service: follow the severe-service drain interval prescribed by the vehicle manufacturer in the owner manual.
• Modified engines, racing vehicles, and engines running alternative fuels such as E85, CNG, or propane fall outside the HM530 drain-interval guidance.
• Outside the United States and Canada, follow the vehicle manufacturer's recommended drain interval.

HM530 is compatible with other synthetic and conventional motor oils, but mixing shortens oil life and reduces performance benefits, and extended drain coverage is not supported when oils have been mixed. Aftermarket oil additives are not recommended for use with this oil. Pair the oil change with a fresh AMSOIL oil filter for full protection across the drain interval.

Typical technical properties

Order AMSOIL 5W-30 High-Mileage Motor Oil

HM530 is available in a quart bottle (product code HM530QT-EA), a case of 12 quarts (HM530QT-CA), a gallon jug (HM5301G-EA), and a 55 gallon drum (HM53055-EA). Using AMSOIL synthetic lubricants or practicing extended drain intervals 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 right grade for the engine with the AMSOIL Vehicle Lookup Guide, compare AMSOIL 5W-30 motor oils in the 5W-30 Oil Guide, then order AMSOIL 5W-30 100% Synthetic High-Mileage Motor Oil.

Frequently asked questions