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. Shifting Out of Park (Automatic Transmission)
This vehicle is equipped with an electronic shift lock
release system. The shift lock release is designed to:
- Prevent ignition key removal unless the shift lever
is in P (Park) with the shift lever button fully
released, and
- Prevent movement of the shift lever out of
P (Park) unless the ig ...