American Petroleum Institute (API) Engine Oil Identification Symbol

This symbol means that the oil has been certified by the American Petroleum Institute (API). The manufacturer only recommends API Certified engine oils.
CAUTION!
Do not use chemical flushes in your engine oil as the
chemicals can damage your engine. Such damage is
not covered by the New Vehicle Limited Warranty.
See also:
Tire Terminology And Definitions
...
Selection Of Lubricant
Use only manufacturer’s recommended fluid. Refer to “Fluids, Lubricants, and
Genuine Parts” in “Maintaining Your Vehicle” for further information. ...
MMT In Gasoline
MMT is a manganese containing metallic additive that is
blended into some gasoline to increase octane. Gasoline
blended with MMT provides no performance advantage
beyond gasoline of the same oct ...


