Other information:
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 octane number without MMT. Gasoline blended with MMT
reduces spark plug life and reduces emissions system performance in some vehicles...
INSTRUMENT CLUSTER DESCRIPTIONS
Tachometer
Indicates the engine speed in revolutions per minute (RPM x 1000).
Instrument Cluster Display
When the appropriate conditions exist, this display shows the instrument
cluster display messages...