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. Front Side Marker Lamp Bulb, Replace
1.
Remove headlamp bracket assembly.
2.
Rotate marker lamp bulb harness electrical
connector (1) counterclockwise to unlock from headlamp assembly,
Fig. 1.
3.
Remove front side marker lamp bulb
(2) ...