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.
Chevrolet Cobalt Service & Repair Manual. Tightening Specifications
Year
Component
Torque Ft. Lbs.
AVEO
2010
Bleeder Screw
80 1
Bleeder Valve
53 1
Booster & Support Bracket
18
...