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. Crankshaft Damper R&R
Removal
1.
Raise and support vehicle.
2.
Remove front tire and wheel assembly.
3.
Remove front fender liner.
4.
Turn drive belt tensioner clockwise.
5.
Rem ...