Buick Enclave: Recommended Fuel. Gasoline Specifications (U.S. and Canada Only). California Fuel Requirements
Use regular unleaded gasoline with a posted octane rating of 87 or higher. If
the octane rating is less than 87, an audible knocking noise, commonly referred
to as spark knock, might be heard when driving. If this occurs, use a gasoline rated
at 87 octane or higher as soon as possible. If heavy knocking is heard when using gasoline rated at 87 octane or higher,
the engine needs service. 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 Fuel Additives for additional information. If the vehicle is certified to meet California Emissions Standards, it is designed
to operate on fuels that meet California specifications. See the underhood emission control label. If this fuel is not available in states
adopting California Emissions Standards, the vehicle will operate satisfactorily
on fuels meeting federal specifications, but emission control system performance
might be affected. The malfunction indicator lamp could turn on and the vehicle
might fail a smog-check test. See Malfunction Indicator Lamp . If this occurs, return to your authorized dealer
for diagnosis. If it is determined that the condition is caused by the type of fuel used, repairs
might not be covered by the vehicle warranty.Recommended Fuel
Gasoline Specifications (U.S. and Canada Only)
California Fuel Requirements
