If you plan on driving in another country outside the United States or Canada, the proper fuel might be hard to find. Never use leaded gasoline or any other fuel not recommended in the previous text on fuel. Costly repairs caused by use of improper fuel would not be covered by the vehicle warranty.
To check the fuel availability, ask an auto club, or contact a major oil company that does business in the country where you will be driving.
Additives
Filling the TankChevrolet Cobalt Service & Repair Manual. Precautions
1.
After disassembling power brake unit,
soak metal components in solvent.
2.
Use only alcohol on components containing
rubber. After components have been thoroughly cleaned and rinsed
in solvent, they should be washed again ...