170 Fuel suppl y and filli n g your fuel tank
Fuel supply and filling
your fuel tank
Gasoline
Fuel supply
Using the right fuel helps keep the environ-
ment clean and prevents engine damage .
Fuel re co mm e ndation
The fuel recommended for your vehicle is un-
leaded premium
grade gasoline . See also
¢ page 228, Data . Audi recommends using
TOP TI ER Detergent Gasoline with a minimum
octane rating of 91 AKI (95 RON). For more
information on TOP TI ER Detergent Gasoline,
please go to the officia l 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 specified 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/91 RON octane fuel wi ll slightly re-
duce engine performance.
Use unleade d gasoline only. Unleaded gaso-
line is available throughout the USA, Canada,
and in most European countries . We recom-
mend that you do not take your vehicle to
areas or countries where unleaded gasoline
may not be available.
For more informat ion on refue li ng your vehi-
cle, see
¢ page 171.
Octane rat ing
Octane rating indicates a gasoline's ability to
resist engine damaging "knock" 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 commonly used in the United
States and Canada has the following octane
ratings that can usually be found on the fi ll er
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 Number
MON = Motor Octane Number .
(D Note
- Do not use any fuel w ith octane rat ings
lower than 87 AKI or 91 RON otherwise
expensive engine damage w ill occur.
- Do
not use leaded gasoline! The use of
leaded gasoline w ill severely damage
your vehicle's catalytic converter and its
ability to control exhaust emissions .
Blended gasoline
Use of gasoline containing alcohol or
MTBE (m ethyl tertia ry butyl eth er)
You may use unleaded gasoline blended with
alcohol or MTBE (commonly referred to as
oxygenates) if the blended mixture meets the
fo ll owing criteria:
Blend of gaso line met hanol (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 etha nol (grain alcohol
or eth yl alcohol )
- Anti -knock index must be 87 AKI or higher .
- Blend must not contain more than 10%
ethanol.
Blend of gaso line and MTBE
- Anti-knock index must be 87 AKI or higher. ll-
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