AMSOIL sets industry benchmark in lubrication technology. AMSOIL is the first company to coin the phrase “extended drain” in 1973 by offering the World's first “extended drain” lubricants.
AMSOIL Signature Series “extended drain” lubricants are formulated for 25,000 Miles (40,000 kms) or 1 year of service life.
AMSOIL Signature Series “extended drain” lubricants are designed for those who demand the absolute best
in motor oil performance. The exclusive “extended drain” formulation delivers superior engine protection and maximum fuel economy and exceeds the specification requirements of modern, high performance and older engines.
Engineered to outperform all conventional gasoline engine motor oils. Reduces heat, friction, and wear for maximum performance and fuel efficiency. Clean engine formula resists high-temp breakdown that forms sludge and varnish. Lasts longer and offers better protection.
AMSOIL Signature Series “extended drain” 100% Synthetic Motor Oils are formulated in 0W20
viscosity to fulfill majority of gasoline motor oil applications.
AMSOIL also formulates full line of “extended drain” high performance diesel motor oils in 5W30