Fuel Supply - Volkswagen Jetta Wagon 2004 Owner's Manual

TIPS AND ADVICE
Fuel supply
~Use
only unleaded fuel in your • Do not use leaded gasoline!
vehicle. The use of leaded gasoline will
se-
Octane rating
Octane rating indicates a gasoline's ability
to resist engine damaging "knock" caused
by pre-ignition and detonation . Therefore.
buying the correct grade of gasoline is very
important to help prevent possible engine
damage and a loss of engine performance.
The recommended gasoline octane rati ng
for your engine can be found on a label lo-
cated on the inside of the fuel filler flap. This
rating may be specified as AKI (CLC) or RON
(ROZ).
Gasolines most commonly used in the
United States and Canada have the follow-
ing octane ratings that can usually be found
on the filler pump:
Premium Grade: 91 - 96 AKI
Regular Grade: 87 - 90 AKI
Fuel Recommendation
115 hp engine
The fuel recommended for your ve-
hicle is unleaded regular grade gas-
oline with a minimum octane rating
of 87 AKI (CLC) or 91 RON (ROZ).
180 hp engine
The fuel recommended for your ve-
hicle is unleaded premium grade
gasoline with a minimum octane rat-
ing of 91 AKI (CLC) or 95 RON (ROZ).
Notes
• Do not use any fuel with octane
ratings lower than 87 AKI or 91 RON
otherwise expensive engine damage
will occur.
verely damage your vehicle's cata-
lytic converter and its ability to con-
trol exhaust emissions.
Unleaded gasoline is available throughout
the USA. Canada. and in most European
countries. We recommend t hat you do not
take your vehicle to areas or countries
where unleaded gasoline may not be avail-
able.
Use of gasoline containing alcohol
I
or MTBE (methyl tertiary butyl
ether)
You may use unleaded gasoline blended
with alcohol or MTBE (commonly referred
to as oxygenates) if the blended mixture
meets the following criteria:
Blend of gasoline methanol (wood
alcohol or methyl alcohol)
-Anti-knock index must be 87 or higher
- Blend must contain no more than 3%
methanol
-Blend must contain more than 2% co-sol-
vents
Note
Methanol fuels which do not meet
these requirements may cause cor-1
rosion and damage to plastic and
rubber components in the fuel sys-
tem.
Blend of gasoline and ethanol
(grain alcohol or ethyl alcohol)
-Anti-knock index must be 87 AKI or higher.
-Blend must not contain more than 1 0%
ethanol.
4
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