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. Door Latch
Front
1.
Remove front door trim panel as outlined
in "Door Trim Panel.".
2.
Remove water deflector from front door.
3.
Remove three door latch retaining screws,
Fig. 1.
...