Jaguar XK. Service manual - part 47

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Fuel and refuelling

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Fuel and refuelling

SAFETY PRECAUTIONS

FUEL QUALITY

Gasoline engined vehicles

WARNINGS

Petroleum gasses are highly 
flammable, have a low flash point 
and are explosive, especially in 

confined spaces. Avoid exposing the 
gasses to any potential sources of 
ignition as the resulting fire and 
explosion may cause serious injuries 
and/or death.

Only use containers specifically 
designed for carrying fuel, and 
alway remove them from the 

vehicle to fill them. Failure to do so may 
result in spillage and cause a fire.

Switch off the engine when 
refuelling, as it is both a source of 
extreme temperatures, and 

electrical sparks. The resulting fire and 
explosion may cause serious injury and 
death.

Switch off any personal electronic 
devices such as mobile phones, 
or music players. They have the 

potential to cause electrical sparks. The 
resulting fire and explosion may cause 
serious injury and death.

Do not smoke, use a naked flame, 
or cause sparks. The resulting fire 
and explosion may cause serious 

injury and death.

Do not overfill the fuel tank. 
Overfilling may cause spillage 
when the vehicle is driven. 

Spillage may also occur if the fuel 
expands in high ambient temperatures.

The presence of any unusual 
fumes (for example, gasoline or 
exhaust fumes) in the passenger 

compartment and or luggage 
compartment should be corrected 
immediately by a Jaguar Dealer. If you 
must drive under these conditions do so 
only with all windows fully open.

Any modifications to the fuel 
system not specifically designed 
for this Jaguar are prohibited. 

Such modifications in some 
circumstances could result in a fire. All 
service actions should be entrusted to a 
Jaguar Dealer.

CAUTION

Catalytic Converter - Do not 
continue to operate the vehicle if 
any engine malfunction is evident. 

Misfire, loss of engine performance, 
excessive oil consumption or engine 
run-on may lead to unusually high 
catalytic converter temperatures and 
may result in damage.

CAUTIONS

Do not use leaded fuels, lead 
substitutes, or fuel additives. Doing 
so can cause damage to the 

engine, fuel, and emission control 
systems.

Only use high quality gasoline, as 
using lower quality fuels can cause 
damage to the engine, fuel, and 

emission control systems.

WARNINGS

Fuel and refuelling

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Unleaded fuel

Unleaded fuel must be used for the 
emission control system to operate 
properly. Its use will also reduce spark 
plug fouling, exhaust system corrosion 
and engine oil deterioration.

Use only unleaded gasoline with a 
minimum anti-knock index (AKI) of 91. 
Using unleaded fuel with a lower AKI than 
recommended can cause persistent 
heavy spark knock ( a metallic rapping 
noise). If severe, this can lead to engine 
damage.

If a heavy spark knock is detected even 
when using fuel to the recommended 
octane rating, or if you hear steady spark 
knock while holding a steady speed on 
level roads, consult a Jaguar Dealer to 
have the problem corrected. Failure to do 
so is misuse of the vehicle, for which 
Jaguar Cars is not responsible. However, 
occasional light spark knock for a short 
time while accelerating or driving up hill, 
may occur.

Alternative fuels

Fuels containing alcohol

Some fuel suppliers sell fuel containing 
alcohol without advertising its presence. 
Where uncertainty exists check with the 
service station operator.

Note: Some difficulty in starting may be 
encountered when using alcohol blended 
fuel.

Ethanol

Fuels containing up to 10% Ethanol (grain 
alcohol) may be used. Ensure that the fuel 
has octane ratings no lower than those 
recommended for unleaded fuel. Most 
drivers will not notice any operating 
difference with fuel containing Ethanol. If 
a difference is detected, the use of 
conventional unleaded fuel should be 
resumed.

Fuel system cleaning agents 
should not be used, unless 
approved by Jaguar Cars. 

Unapproved products may be harmful to 
fuel system components on your vehicle.

CAUTIONS

CAUTION

Fuel containing alcohol can cause 
paint damage, which may not be 
covered under the warranty.

CAUTIONS

This vehicle is not suitable for use 
with fuels containing more than 
10% Ethanol.

Do not use E85 fuels (85% Ethanol 
content). Equipment necessary for 
the use of fuels containing more 

than 10% Ethanol is not fitted to this 
vehicle. If E85 fuels are used, serious 
engine and fuels system damage will 
occur.

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Fuel and refuelling

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Methanol

Some fuels contain Methanol (Methyl or 
wood alcohol). If you use fuels containing 
Methanol the fuels must also contain 
co-solvents and corrosion inhibitors for 
Methanol. Also, do not use fuels which 
contain more than 3% Methanol even if 
they contain co-solvents and corrosion 
inhibitors. Fuel system damage or vehicle 
performance problems resulting from the 
use of such fuels is not the responsibility 
of Jaguar Cars, and may not be covered 
under the warranty.

Methyl Tertiary Butyl Ether (MTBE)

Unleaded fuel containing an oxygenate 
known as MTBE can be used provided 
that the ratio of MTBE to conventional 
fuel does not exceed 15%. MTBE is an 
Ether based compound derived from 
Petroleum, which has been specified by 
several refiners as the substance to 
enhance the Octane rating of fuel.

Reformulated gasoline

Several petroleum companies have 
announced the availability of 
reformulated fuels. These fuels are 
specially formulated to further reduce 
vehicle emissions. Jaguar Cars fully 
supports all efforts to protect and 
maintain ambient air quality, and 
encourages the use of reformulated 
gasoline where available.

RUNNING OUT OF FUEL

Note: If the vehicle does run out of fuel, a 
minimum of 4 litres (0.8 gallons) will be 
required to restart the engine. The vehicle 
will need to be driven 1.6-5 km (1-3 miles) 
in order to reset the engine management 
and monitoring systems.

Note: If the vehicle does run out of fuel, 
seeking qualified assistance is advisable.

FUEL FILLER FLAP

CAUTIONS

Avoid running out of fuel. Doing so 
can cause damage to the vehicle's 
engine, fuel, and emission control 

systems.

Do not run the fuel tank dry. 
Running the fuel tank dry could 
create an engine misfire.

WARNINGS

Open the fuel filler cap slowly and 
allow the pressure to release 
before fully removing the cap to 

avoid fuel spillage due to rapid 
expansion.

Take note of all warnings and 
instructions given on the label 
affixed to the inside of the filler 

flap. Failure to do so may result in injury 
or death.

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The fuel filler flap release switch is 
located in the knee bolster switchpack 
below the facia. The switch is inhibited if 
the vehicle is armed. The filler flap is on 
the right-hand side of the vehicle.

A label on the inside of the fuel filler flap 
serves as a reminder to fill the tank with 
the correct fuel.

REFUELLING

Fuel filling

Gas station pumps are equipped with 
automatic cut-off sensing to avoid fuel 
spillage. Fill the tank slowly until the filler 
nozzle automatically cuts-off the supply. 
Do not attempt to fill the tank beyond this 
point.

To remove the filler cap, turn it 
counterclockwise approximately a ¼ 
turn, until a slight resistance is met. 
Continue turning to release it. Remove 
the cap from the filler neck.

The cap is held by a retaining strap and 
can be stowed on the filler flap hook.

WARNINGS

Do not fully remove the fuel filler 
cap until any captive tank 
pressure has been released (wait 

until the hissing stops).

When refuelling ensure that all 
windows, doors, and sunroof are 
fully closed, particularly if young 

children or animals are in the vehicle. 
Fuel vapour contains harmful chemical 
compounds, some of which may cause 
cancer.

Do not attempt to fill the tank to its 
maximum capacity. If the vehicle 
is to be parked on a slope, in 

direct sunlight, or high ambient 
temperature, expansion of the fuel could 
cause spillage.

JAG0521L

CAUTIONS

Ensure that you check the fuel 
pump information carefully to 
ensure that you are putting the 

correct fuel into the vehicle. Filling a 
vehicle with the incorrect fuel can cause 
serious engine and fuel system damage.

If the vehicle is filled with incorrect 
fuel it is essential that you seek 
qualified assistance before you 

start the engine. Running the engine can 
cause serious engine and fuel system 
damage.

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