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. Tire Pressure Monitor System
The vehicle may have a Tire Pressure Monitor System
(TPMS). This system uses radio and sensor technology
to check tire pressure levels. The TPMS sensors
monitor the air pressure in your vehicle's tires and
transmit tire pressure readings to a receiver located
in the vehicle.
Each tire, includi ...