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. Headlamps
The lever on the left side of the steering column
operates the exterior lamps.
The exterior lamp switch has the following
four positions:
(Headlamps): Turns on the
headlamps, parking
lamps, and taillamps.
(Parking Lamps): Turns on the
parking lamps and
taillamps only.
AUTO (Automatic H ...