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. Axle Shaft Oil Seal R&R
1.
Raise and suitably support the vehicle.
2.
Remove the front wheel and tire assemblies.
3.
Insert a punch or drift in the cooling
fins of the brake rotor.
4.
Using a breaker bar ...