A robust transmission fluid keeps a vehicle’s drivetrain performing the way it should with smooth shifting, no slipping and long-term wear protection. AMSOIL manufactures a variety of high-quality automatic and manual transmission fluids. SIGNATURE SERIES SYNTHETIC ATF Signature Series Synthetic […]


Signature Series once again raises the bar for motor oil performance The sequence IIIG Engine Test (ASTMD7320) is designed to evaluate automotive motor oils for oil thickening, piston deposits, oil consumption and engine wear during moderately high-speed, high-temperature service. It […]

Internal Diesel Injector Deposits

Advancements in diesel fuel delivery systems have resulted in more power, improved fuel economy and fewer emissions. But one challenge remains: performance-robbing deposits. The HEUI System In the early 1990s, diesel engine manufacturers began seeking ways to increase fuel efficiency […]

Oil Analysis Can Provide Tremendous Value

Carefully consider all factors before performing an analysis to ensure maximum cost-effectiveness. Oil Analyzers Value Kit as a cost-effective test to determine whether motor oil is suitable for continued use. The kit provides “just the facts,” information and can be […]

Quality Filtration Is Equally As Important As Quality Lubrication

Filters are often overlooked, but they are integral to keeping oil clean and performing at its best. It’s often said that motor oil is the lifeblood of the engine. We depend on it to prevent wear, maintain cleanliness, minimize operating […]

Fuel-System Maintenance is Essential in Modern Engines

Without regular cleaning, today’s engines will not deliver the power and fuel economy they are designed to deliver. It used to be common practice for vehicle owners to spend a Saturday afternoon in the garage, giving the vehicles a tune-up. […]

Two and Four Stroke Engine Applications and Lubrication Needs

Two-stroke and four stroke engines are designed differently and operate under different conditions, requiring different lubrication methods. Internal combustion engines are used to produce mechanical power from the chemical energy contained in hydrocarbon fuels. The power producing part of the […]

The Thick and Thin of Grease

UNIQUE THICKENER SYSTEMS GIVE EACH GREASE ITS DISTINCTIVE PERFORMANCE CHARACTERISTICS. Grease manufacturing is a highly complex and detailed process that starts with base oil, thickener and additives. Base oil provides the lubricity and foundation consistency of grease while thickener constitutes […]

Updated Las Vegas Taxicab Field Study

This field study has been updated (G3118) to include new transmission results from another Dodge Charger taxi cab that accumulated 12,891 hours (183,705 miles) on a single transmission fluid change. The second edition of the Las Vegas taxicab field study includes […]

Influencing the Influencers

AMSOIL partnered with the MOTORCYCLE MECHANICS INSTITUTE (MMI) and MARINE MECHANICS INSTITUTE (MMI) AMSOIL has entered a partnership with Universal Technical Institute (UTI) to become the official oil of its motorcycle and marine divisions, the Motorcycle Mechanics Institute (MMI) and […]