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. Engine No Start
A visual inspection must always
be performed to confirm the presence of aftermarket components, potential
collision damage, or areas of concern.
Caution: The fuel system is
under constant pressure, even with the key off. Before testing or servicing
fuel system rel ...