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. Split Folding Rear Seat
You can fold either side of the rear seatback down for
more cargo space.
To lower the rear seatback, follow these steps:
1. Open the trunk and pull one or both of the small
handles located in the center of the trunk.
Notice: Folding a rear seat with the safety belts
still fastened may cause ...