Fuel supply and fill ing
your f uel tank
Gasoline
Fuel supply
Using the right fuel helps keep the environ-
ment clean and prevents engine damage.
Fuel recommendation
The fuel recommended for your vehicle is un-
leaded premium
grade gasolin e. See also
¢ page 257, Data . Audi recommends using
TOP TIER Detergent Gasoline with a minim um
octane rati ng of 91 AKI (95 RON). For more
information on TOP TIER Det ergent Gasoline,
please go to the official website (www.toptier -
gas.com).
The recommended gasoline octane rating for
your engine can also be found on a label locat-
ed on the inside of the fuel filler flap . This rat-
ing may be specif ied as AKI or RON.
Your vehicle may also be operated using un-
leaded regular gasoline with a minimum oc-
tane rating of 87 AKI/91 RON. However, using
87 AKI/9 1 RON octane fuel will slightly re-
duce engine perfo rmance.
Use unleaded gasoline only. Unleaded gaso-
line is available th rougho ut the USA, Canada,
and in most European countries . We recom-
mend that you do not ta ke your vehicle to
areas or count ries where unleaded gasoline
may not be available.
For more informat ion on refue ling your vehi-
cle, see
¢ page 191.
Octane rating
Octane rati ng indicates a gasoline's abili ty to
resist engine damaging "knoc k" caused by
premature ign ition and detonation. Therefore,
buying the correct grade of gasoline is very
important to help prevent possible engine
damage and a loss of engine performance.
Gasoline most common ly used in the United
States and Canada has the followin g octane
Fuel supply and filling your fuel tank 189
ratings that can usually be found on the fi ller
pump :
- Premium Grade: 91 - 96 AKI
- Regular Grade: 87 - 90 AKI
Explanation of the abbreviations:
AKI = Anti Knock I ndex = (R+M)/2 = (RON
+MON)/2
RON= Research Octane Num ber
MON = Motor Octane Number.
(D Note
- Do not use any fue l wit h octane rat ings
lower than 87 AKI or 91 RON othe rwise
expensive engine damage will occur.
- Do
not use leaded gasoli ne! The use of
leaded gasolin e will severely damage
your vehicle's catalytic converter and its
ability to control exhaust emissions.
Blended gasoline
Use of gasoline containing alcohol 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
fo llowing criteria:
Blend of gasoline methanol (wood alcohol or
methyl alcohol)
- Anti -knock index must be 87 AKI or higher.
- Blend must contain no more than 3% meth-
anol.
- Blend must contain more than 2% co-sol-
vents .
Blend of gasoline and ethanol (grain alcohol
or ethyl alcohol)
- Anti -knock index must be 87 AKI or higher.
- Blend must not conta in more tha n 10%
ethanol.
Blend of gasoline and MTBE
- Anti -knock index must be 87 AKI or higher. ll>-
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