AMSOIL XL Synthetic Motor Oils have been reformulated to last longer in service and meet the more stringent ILSAC GF-5 and API SN service categories. Available in four different viscosities, XL Synthetic Motor Oils are recommended for up to 10,000 miles or six months of service, whichever comes first, or longer when recommended in owners’ manuals or indicated by electronic oil life monitoring systems.

These API-certified XL Series Synthetic Motor Oils have been designed to meet the new API SN, ILSAC GF-5, and GM dexos1™ (SAE 5W30 viscosity) specifications, in addition to many other North American, European and Japanese specifications.

Formulated with friction modifiers, AMSOIL XL Synthetic Motor Oils are fuel-efficient oils that reduce friction-related energy loss. They provide better fuel economy compared to conventional, non-fuel-efficient motor oils.

AMSOIL, the leader in automotive synthetic lubrication, produced the world’s first API-qualified synthetic motor oil in 1972. Trust the extensive experience of AMSOIL, the First in Synthetics®, to do the best job protecting your engine.

Here is the link for more info: https://www.thebestoil.com//products/amsoil-synthetic-motor-oils-motor-oils-that-are-designed-not-refined/