Buick 2003 LeSabre Owner's Manual page 258

If you plan on driving in another country outside the
United States or Canada, the proper fuel may 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 wouldn't be
covered by your warranty.
To check the fuel availability, ask an auto club, or
contact a major oil company that does business in the
country where you'll be driving.
Filling Your Tank
The fuel cap is behind a hinged fuel door on the driver's
side of the vehicle.
Fuel vapor is highly flammable. It burns
I
violently, and that can cause very bad injuries.
your vehicle. Keep sparks, flames and smoking
materials away from fuel.
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