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. Radiator Fan Shroud R&R
1.
Disconnect the cooling fan electrical
connector.
2.
Remove the cooling fan wire from the
fan shroud, Fig. 1.
3.
Raise and support the vehicle.
4.
Remove the cooling fan a ...