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SM Current
For all automotive engines presently in use. Introduced November 30, 2004. SM oils are designed to provide improved oxidation resistence, improved deposit protection, better wear protection, and better low-temperature performance over the life of the oil. Some SM oils may also meet the latest ILSAC specification and/or qualify as Energy Conserving.
SL Current
For 2004 and older automotive engines.
SJ Current
For 2001 and older automotive engines.
SH Obsolete
For 1996 and older engines. Valid when preceded by current C categories.
SG Obsolete
For 1993 and older engines.
SF Obsolete
For 1988 and older engines.
SE Obsolete
CAUTION - Not suitable for use in gasoline-powered automobile engines build after 1979.
SD Obsolete
CAUTION - Not suitable for use in gasoline-powered automobile engines build after 1971. Use in more modern engines may cause unsatisfactory performance or equipment harm.
SC Obsolete
CAUTION - Not suitable for use in gasoline-powered automobile engines build after 1967. Use in more modern engines may cause unsatisfactory performance or equipment harm.
SB Obsolete
CAUTION - Not suitable for use in gasoline-powered automobile engines build after 1963. Use in more modern engines may cause unsatisfactory performance or equipment harm.
SA Obsolete
CAUTION - Not suitable for use in gasoline-powered automobile engines build after 1930. Use in more modern engines may cause unsatisfactory performance or equipment harm.
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