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 Service & Repair Manual. Description
The TPMS (Tire Pressure Monitor
System) warns the driver when a significant loss or gain of tire pressure
occurs in any of the four tires, and allows the driver to display the individual
tire pressures and the locations on the DIC (Driver Information Center)
display. The syste ...