At a minimum, gasoline should meet ASTM specification D 4814 in the United States or CAN/CGSB-3.5 or 3.511 in Canada. Some gasolines contain an octane-enhancing additive called methylcyclopentadienyl manganese tricarbonyl (MMT).
We recommend against the use of gasolines containing MMT. See Additives for additional information.
Gasoline Octane
California FuelChevrolet Cobalt Owners Manual. Instrument Panel Cluster
The instrument panel cluster is designed to show how the vehicle is running.
It shows how fast the vehicle is going,
about how much fuel is left in the tank, and many other things needed to drive
safely and economically.
United States SS, Manual Transmission Cluster shown, Canada, Base and
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