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. Turn Signal/Multifunction Lever
The lever on the left side of the steering column
operates the following:
: Turn and Lane-Change Signals
: Headlamp High/Low-Beam
Changer
: Exterior Lamp Control
Flash-to-Pass.
Information for these features is on the pages following. ...