Gasoline Octane
If the vehicle has the 6.0L V8 engine (VIN Code J), useregular unleaded gasoline with a posted octane ratingof 87 or higher. If the octane rating is less than 87, anaudible knocking noise, commonly referred to as sparkknock, might be heard when driving. If this occurs, usea gasoline rated at 87 octane or higher as soon aspossible. If heavy knocking is heard when usinggasoline rated at 87 octane or higher, the engineneeds service.
If the vehicle has the 6.2L V8 engine (VIN Code F), usepremium unleaded gasoline with a posted octane ratingof 91 or higher. You can also use regular unleadedgasoline rated at 87 octane or higher, but the vehicle'sacceleration could be slightly reduced, and a slightaudible knocking noise, commonly referred to as sparkknock, might be heard. If the octane is less than 87, youmight notice a heavy knocking noise when you drive.If this occurs, use a gasoline rated at 87 octane orhigher as soon as possible. Otherwise, you coulddamage the engine. If heavy knocking is heard whenusing gasoline rated at 87 octane or higher, the engineneeds service.
Gasoline Specifications
At a minimum, gasoline should meet ASTMspecification D 4814 in the United States orCAN/CGSB!3.5 or 3.511 in Canada. Some gasolinescontain an octane-enhancing additive calledmethylcyclopentadienyl manganese tricarbonyl (MMT).We recommend against the use of gasolines containingMMT. SeeAdditiveso n p a g e 7!9for additionalinformation.
California Fuel
If the vehicle is certified to meet California EmissionsStandards, it is designed to operate on fuels that meetCalifornia specifications. See the underhood emissioncontrol label. If this fuel is not available in statesadopting California emissions standards, the vehiclewill operate satisfactorily on fuels meeting federalspecifications, but emission control system performancemight be affected. The malfunction indicator lamp couldturn on and the vehicle might fail a smog!check test.SeeMalfunction Indicator Lampon page 4!36. If thisoccurs, return to your authorized dealer/retailer fordiagnosis. If it is determined that the condition is causedby the type of fuel used, repairs might not be coveredby the vehicle warranty.
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If the vehicle has a Driver Information Center (DIC), theTIGHTEN GAS CAP message displays if the fuel cap isnot properly installed.
{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. Leave the area immediately.
Notice:If you need a new fuel cap, be sure to getthe right type. Your dealer/retailer can get one foryou. If you get the wrong type, it may not fitproperly. This may cause the malfunction indicatorlamp to light and may damage the fuel tank andemissions system. SeeMalfunction Indicator Lampon page 4!36.
Filling a Portable Fuel Container
{WARNING:
Never fill a portable fuel container while it is in
the vehicle. Static electricity discharge from the
container can ignite the fuel vapor. You can be
badly burned and the vehicle damaged if this
occurs. To help avoid injury to you and others:
.Dispense fuel only into approved containers.
.Do not fill a container while it is inside a
vehicle, in a vehicle's trunk, pickup bed,
or on any surface other than the ground.
.Bring the fill nozzle in contact with the inside
of the fill opening before operating the nozzle.
Contact should be maintained until the filling
is complete.
.Do not smoke while pumping fuel.
.Do not use a cellular phone while
pumping fuel.
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