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. Wheel Lug Stud, Replace
Suspension fasteners are critical
components because they affect performance of vital components and systems
and their failure may result in major service expense. New components must
be installed with the same component numbers or equivalent components, if
replacement is requ ...