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. Battery Cable, Replace
Ground Cable
Battery To Battery Tray
Caution: Unless directed otherwise,
the ignition and start switch must be in the OFF or LOCK position, and all
electrical loads must be OFF before servicing any electrical component.
Disconnect the battery ground to prevent an electrical spar ...