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. Powertrain Drivability Diagnosis & Testing
A visual inspection must always
be performed to confirm the presence of aftermarket components, potential
collision damage, or areas of concern.
Detailed information from the
customer is key is duplicating and diagnosing a performance concern. Use
of a customer in ...