AMSOIL 5W-20 100% SYNTHETIC HIGH-MILEAGE MOTOR OIL

AMSOIL 5W-20 100% Synthetic High-Mileage Motor Oil delivers purpose-built cleaning power, seal conditioning, and wear protection for engines with over 75,000 miles. It is a direct upgrade over conventional and competing synthetic high-mileage oils for drivers looking to extend the useful life of their vehicles.

Older engines accumulate sludge and deposits that rob performance and efficiency over time. Worn seals begin to leak. Cylinders lose compression as piston rings wear, and oil consumption creeps up between changes. These are not signs that an engine is finished. They are signs it needs a motor oil formulated to address what is actually happening inside a high-mileage powertrain.

CLEANS SLUDGE FROM HIGH-MILEAGE ENGINES
Sludge builds up over tens of thousands of miles, restricting oil passages and coating internal components. AMSOIL 5W-20 High-Mileage Motor Oil uses a boosted detergent and dispersant package designed to actively remove that buildup. In a modified Sequence VH test (ASTM D8256), AMSOIL High-Mileage Motor Oil reduced existing engine sludge by 67% after the oil was changed in. That is not just preventing new deposits. It is cleaning out what previous oils left behind, helping restore oil flow and engine efficiency in vehicles like the Ford F-150, Toyota Camry, Honda CR-V, and Chevy Silverado 1500 that have been on the road for years.

UP TO 62% BETTER DEPOSIT PREVENTION THAN VALVOLINE AND MOBIL 1
In the industry-standard TEOST 33C test (ASTM D6335), required by the ILSAC GF-6 specification, AMSOIL High-Mileage Motor Oil produced just 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 62% fewer deposits than Valvoline and 62% fewer than Mobil 1 in the same standardized test. Fewer deposits mean cleaner injectors, cleaner ring lands, and better combustion efficiency across extended use in popular 5W-20 applications like the Ford EcoBoost 2.0L and 2.5L, Honda K24, and GM Ecotec engines.

DURABLE VISCOSITY UNDER EXTREME OPERATION
As engines accumulate miles, maintaining proper oil film thickness becomes more important. Worn cylinders and piston rings mean tighter tolerances are no longer doing the work of sealing combustion chambers. The oil has to pick up the slack. AMSOIL 5W-20 High-Mileage Motor Oil is formulated to hold its viscosity even in high-heat, high-stress conditions. With a kinematic viscosity of 8.8 cSt at 100°C, an HTHS viscosity of 2.8 cP, and a viscosity index of 158, it maintains film strength across a wide operating temperature range without thinning out during highway driving or stop-and-go city commutes.

CONTROLS OIL CONSUMPTION AND VOLATILITY
Oil consumption between changes is one of the most common complaints from owners of high-mileage vehicles. A significant contributor is volatility, where lighter oil fractions burn off under heat. AMSOIL 5W-20 High-Mileage Motor Oil delivers a NOACK volatility of just 7.7% weight loss (ASTM D5800), meaning it resists evaporative loss and helps keep oil levels stable between changes. This is particularly relevant for high-mileage Toyota 2.5L, Nissan QR25DE, and Ford Duratec engines that are known to consume oil as they age.

CONDITIONS SEALS TO HELP PREVENT LEAKS
Oil seeps and drips around valve covers, oil pans, and timing covers are common in vehicles past 75,000 miles. The rubber and elastomer seals in these areas harden and shrink with age and heat exposure. AMSOIL 5W-20 High-Mileage Motor Oil includes a boosted dose of seal conditioners that help restore flexibility and swell aging seals back toward their original dimensions, reducing the likelihood of leaks without the use of aftermarket stop-leak additives.

SPECIFICATIONS AND COMPATIBILITY
AMSOIL 5W-20 100% Synthetic High-Mileage Motor Oil is API licensed and meets API SQ, SP, SN Plus and earlier, ILSAC GF-7A, GF-6A, GF-5 and earlier, GM dexos1 Gen 3 (supersedes dexos1 Gen 2 and 6094M), Chrysler MS-6395, and Ford WSS-M2C930-A, WSS-M2C945-A, WSS-M2C945-B1, WSS-M2C960-A1, and WSS-M2C970-A1. It is compatible with other conventional and synthetic motor oils, though mixing will reduce its performance benefits and 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. For severe service conditions, follow the severe-service drain interval prescribed in your owner's manual.