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. Safety Belts: They Are for Everyone
This section of the manual describes how to use safety
belts properly. It also describes some things not to do
with safety belts.
WARNING:
Do not let anyone ride where a safety belt
cannot be worn properly. In a crash, if you or
your passenger(s) are not wearing safety belts,
the injuries can ...