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. Belt Tension Data
Removal
1.
Turn Off accessories.
2.
Bring engine to operating temperature.
3.
Turn engine Off.
4.
Read belt tension using belt tension
gauge tool No. J23600B, or equivalent, half ...