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 Bumper Upper Fascia Grille
Removal
1.
Remove front bumper fascia, as outlined
in Front Bumper Fascia.
2.
Remove front bumper fascia grille push
pin retainers (1), Fig. 1.
3.
Remove front bumper fascia grille fasteners
(2). ...