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. Delayed Locking
If your vehicle has power locks, it will have the
delayed locking feature.
This feature will delay the actual locking of the doors
for up to five seconds when the power door lock switch
or remote keyless entry transmitter is used to lock
the vehicle.
If any door is open when locking the vehicl ...