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. Rear Bumper Fascia Bracket
Removal
1.
Remove rear bumper fascia as outlined
in Rear Bumper Fascia.
2.
Remove rear bumper fascia side bracket
bolts (1), Fig. 1.
3.
Remove rear bumper fascia side bracket
(2).
...