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. Removing the Spare Tire and Tools
The equipment you will need is located in the trunk.
Base Models
1. Open the trunk. See Trunk.
2. Lift the trunk liner to access the spare tire and
tools.
A. Cover
B. Retainer
C. Spare Tire
D. Wing Nut
E. Jack and Wheel Wrench
F. Bolt
3. Remove the retainer (B) that holds down the spa ...