Buick Enclave: Fuels in Foreign Countries. Fuel Additives. Filling the Tank
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. To provide cleaner air, all gasolines in the United States are now required to
contain additives that help prevent engine and fuel system deposits from forming,
allowing the emission control system to work properly. In most cases, nothing should
have to be added to the fuel. However, some gasolines contain only the minimum amount
of additive required to meet U.S. Environmental Protection Agency regulations. To help keep fuel injectors and
intake valves clean and avoid problems due to dirty injectors or valves, look for
gasoline that is advertised as TOP TIER Detergent Gasoline. Look for the TOP TIER
label on the fuel pump to ensure gasoline meets enhanced detergency standards developed
by the auto companies. A list of marketers providing TOP TIER Detergent Gasoline
can be found at www.toptiergas.com. For customers who do not use TOP TIER Detergent Gasoline regularly, one bottle
of GM Fuel System Treatment PLUS, added to the fuel tank at every engine oil change,
can help clean deposits from fuel injectors and intake valves. GM Fuel System Treatment
PLUS is the only gasoline additive recommended by General Motors. It is available at your dealer Gasolines containing oxygenates, such as ethers and ethanol, and reformulated
gasolines might be available in your area. We recommend that you use these gasolines, if they comply with the specifications
described earlier. However, E85 (85% ethanol) and other fuels containing more than 15% ethanol must
not be used in vehicles that were not designed for those fuels. Notice: This vehicle was not designed for fuel that contains methanol. Do
not use fuel containing methanol. It can corrode metal parts in the fuel system
and also damage plastic and rubber parts. That damage would not be covered under
the vehicle warranty. Some gasolines that are not reformulated for low emissions can contain an octane-enhancing
additive called methylcyclopentadienyl manganese tricarbonyl (MMT); ask the attendant
where you buy gasoline whether the fuel contains MMT. We recommend against the use
of such gasolines. Fuels containing MMT can reduce spark plug life and affect emission control system
performance. The malfunction indicator lamp might turn on. If this occurs, return to your
dealer for service. To help avoid injuries to you and others, read and follow all the instructions
on the fuel pump island. Turn off the engine when refueling. Do not smoke near fuel
or when refueling the vehicle. Do not use cellular phones. Keep sparks, flames, and smoking materials away from
fuel. Do not leave the fuel pump unattended when refueling the vehicle. This is
against the law in some places. Do not re-enter the vehicle while pumping fuel. Keep children away from the fuel
pump; never let children pump fuel. The tethered fuel cap is located behind a hinged fuel door on the driver side
of the vehicle. To open the fuel door, push the rearward center edge in and release and it will
open. To remove the fuel cap, turn it slowly counterclockwise. The fuel cap has a spring
in it; if the cap is released too soon, it will spring back to the right. While refueling, hang the tethered fuel cap from the hook on the fuel door. Open the fuel cap slowly and wait for any hiss noise to stop. Then unscrew the cap all the way. Be careful not to spill fuel. Do not top off or overfill the tank and wait a
few seconds after you have finished pumping before removing the nozzle. Clean fuel
from painted surfaces as soon as possible. See Exterior Care . When replacing the fuel cap, turn it clockwise until it clicks. Make sure the cap is fully installed. The diagnostic system can determine if the fuel cap has been left off or improperly
installed. This would allow fuel to evaporate into the atmosphere. See Malfunction
Indicator Lamp . Leave the area immediately. Notice: If a new fuel cap is needed, be sure to get the right type of cap
from your dealer. The wrong type of fuel cap might not fit properly, might cause the malfunction
indicator lamp to light, and could damage the fuel tank and emissions system. See Malfunction Indicator Lamp .Fuels in Foreign Countries
Fuel Additives
Filling the Tank
WARNING
Fuel vapor burns violently and a fuel fire can cause bad injuries.
WARNING
Fuel can spray out on you if you open the fuel cap too quickly. If you spill
fuel and then something ignites it, you could be badly burned. This spray can happen
if the tank is nearly full, and is more likely in hot weather.WARNING
If a fire starts while you are refueling, do not remove the nozzle. Shut off
the flow of fuel by shutting off the pump or by notifying the station attendant.
