AMSOIL 5W-30 100% SYNTHETIC HIGH-MILEAGE MOTOR OIL

AMSOIL 5W-30 100% Synthetic High-Mileage Motor Oil delivers targeted cleaning, seal conditioning, and wear protection for engines with over 75,000 miles. It is a purpose-built 5W-30 synthetic motor oil designed to address the specific problems that develop as engines age, from sludge accumulation and deposit buildup to oil consumption and seal degradation.

Older engines face a different set of challenges than new ones. Thousands of heat cycles take a toll on seals, combustion chambers lose compression as rings and cylinders wear, and years of oil changes with lesser products can leave behind varnish and sludge that choke off oil passages. A standard synthetic motor oil is not formulated to reverse that kind of damage. High-mileage engines in vehicles like the Toyota Camry, Honda Accord, Ford F-150, Chevy Silverado, and other popular models with 75,000 miles or more on the odometer need a formulation that actively cleans while it protects.

REDUCES SLUDGE BY 67%
Sludge restricts oil flow, traps heat, and accelerates wear in critical engine components. In a modified Sequence VH test (ASTM D8256), AMSOIL High-Mileage Motor Oil reduced existing engine sludge by 67% following an oil change. The test protocol first built up sludge during a dirty-up phase, then switched to AMSOIL High-Mileage during the cleanup phase. Total engine sludge ratings dropped from a peak of 3.12 down to 1.0 over the course of the cleanup interval. That is not just preventing new sludge from forming. It is actively removing what was already there.

UP TO 62% BETTER DEPOSIT PREVENTION
Deposit buildup robs engines of efficiency and power over time. In the industry-standard TEOST 33C test (ASTM D6335), which is required by the ILSAC GF-6 specification, AMSOIL 0W-20 High-Mileage Motor Oil produced only 15.4 mg of total deposits. Valvoline Full Synthetic High Mileage with MaxLife Technology produced 39.3 mg, and Mobil 1 High Mileage produced 40.5 mg. That is up to 62% fewer deposits than those competing high-mileage oils. The boosted detergent and dispersant package in AMSOIL High-Mileage is formulated to keep engines cleaner at the molecular level, not just slow the rate of contamination.

DURABLE VISCOSITY FOR WORN ENGINES
As cylinders and piston rings wear, engines lose compression. A motor oil that shears down or thins out under stress makes that problem worse. AMSOIL 5W-30 High-Mileage Motor Oil maintains a high-temperature/high-shear (HTHS) viscosity of 3.3 cP, which preserves a robust fluid film between moving parts even during extreme operation. The viscosity index of 170 reflects strong thermal stability across a wide temperature range, helping the oil perform consistently whether the engine is idling in traffic or running hard on the highway.

OIL-CONSUMPTION CONTROL
High-mileage engines are prone to burning oil, especially during sustained high-temperature operation. AMSOIL 5W-30 High-Mileage Motor Oil posts a NOACK volatility result of 8.5% weight loss (ASTM D5800), indicating strong resistance to evaporative loss. Lower volatility means less oil vapor escaping past the piston rings into the combustion chamber. For drivers who have noticed their oil level dropping between changes, this is a direct, measurable improvement.

SEAL CONDITIONING TO HELP PREVENT LEAKS
Aging seals and gaskets harden and shrink over time, creating gaps that allow oil to seep out. AMSOIL High-Mileage Motor Oil contains a boosted dose of seal conditioners that help restore flexibility to hardened seals, reducing the likelihood of leaks without the need for aftermarket stop-leak additives.

SPECIFICATIONS AND COMPATIBILITY
AMSOIL 5W-30 100% Synthetic High-Mileage Motor Oil is API licensed and meets the following specifications: API SQ, SP, SN Plus and earlier; ILSAC GF-7A, GF-6A, GF-5 and earlier; GM dexos1 Gen 3 (supersedes dexos1 Gen 2, GM 4718M, 6094M); Chrysler MS-6395; Ford WSS-M2C929-A, WSS-M2C946-A, WSS-M2C946-B1, WSS-M2C961-A1, WSS-M2C971-A1. It is compatible with other conventional and synthetic motor oils, though mixing will reduce performance benefits and shorten service life. Aftermarket oil additives are not recommended.

SERVICE LIFE
Normal service: up to 12,000 miles or one year, whichever comes first, in personal vehicles not operating under severe service conditions. For severe service, follow the drain interval prescribed in your vehicle owner's manual.