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. Wiper Switch, Replace
1.
Remove steering column trim covers.
2.
Remove multi-function switch as outlined
in "Multi-Function Switch, Replace."
3.
Remove retaining screws, then the wiper
switch from column.
...