ILSAC Engine Service Classification

DESCRIPTION
GF-5 Introduced in 2010 to provide improvements in turbocharger protection, piston cleanliness, compatibility with ethanol blend fuels, fuel economy durability and emission control system durability.
GF-4 Effectively API SM plus the Sequence VI B fuel economy test with tighter limits. Also tightened limits on phosphorus and introduced limits on sulfur. Released in 2004.
GF-3 Effectively API SL plus the Sequence VI B fuel economy test. Released in 2000.
GF-2 Effectively API SJ plus the Sequence VI A fuel economy test. Released in 1996.
GF-1 Effectively API SH plus the Sequence VI fuel economy test. Released 1990 and revised 1992.