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Fuel supply
and fill ing
your f u el tank
Fuel supply
Gasoline
Applies to vehicles: with gasoline engine
Using the right fuel helps keep the environ -
men t clean and preven ts engine damage.
Fuel recommendation
The fuel recomme nded fo r your vehicle is un-
leaded premium grade gasoline . Audi recom-
mends using TOP TIER Dete rgent Gasoli ne
wit h a minim um oct ane rat ing of 91 AKI (9 5
RON ). For more inform at ion on TOP TIER De-
tergent Gasoline, please go t o t he off icial
websi t e (www .topt iergas.com) .
The recommended gasoline octane rating for
your engine can also be f ound on a label locat-
ed on the inside of the f uel fi ller flap . This rat-
ing may be specified as AKI or RON.
Your veh icle may also be operate d using un-
leaded regular gasoline with a min imu m oc-
tane rating of 87 AKI/91 RON. However, using
87 AKI/ 9 1 RON octa ne f uel w ill sli ghtly re-
duce eng ine perfo rmance .
Use unleaded gasoline only. Unleaded gaso-
line is available th rougho ut t he USA, Canada,
and in most European countries . We recom-
mend that you do not ta ke your vehicle to
areas or countries where unleaded gasoline
may not be available.
For more informat ion on refue lin g your vehi-
cle, see
q
page 251.
Octane rating
Octane rating ind icat es a gasoli ne's ability to
resist engine damaging "kno ck" caused by
premature ign ition and detona t ion. Therefore,
buying the correct grade of gasoli ne is very
importa nt to hel p prevent possible engine
damage and a loss of engine performance.
Gasoline most commonly used in t he Unite d
States and Canada has the following octane
Fuel supply
and filling
your fuel tank
249
rat ings that can usually be found on the fi ll er
pump :
- Premium Grade: 9 1 - 96 AKI
- Regular Grade: 87 - 90 AKI
Explanation of the abbreviations:
AKI = Ant i Knock I ndex = (R+M)/2 = (RON
+MON)/2
RON= Research Oct ane Num ber
MON = Motor Octane Number.
(D
Note
- Do not use any fue l w ith octane rat ings
lower than 87 AKI or 9 1 RON othe rwise
expensive engi ne damage w ill occur.
- Do not use leaded gasoli ne. The use of
leaded gasoline w ill severely damage
your vehicl e's catalytic converter and its
abi lity to control exhaust em issions.
Blended gasoline
Appli es to vehicles: wi th gasoli ne engine
Use of gasoline containing alcohol or
MTBE (methyl tertiary butyl ether)
You may use unleaded gasoline blen ded wit h
alcohol or MTBE (commonly referred to as
oxygenates) if the blende d mixture meets the
f oll ow ing criteria:
Blend of gasoline methanol (wood alcohol or
methyl alcohol)
- Anti -knock index must be 87 AKI or higher.
- Blend must contain no mor e than 3% meth-
anol.
- Blend must contain more t han 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 mo re tha n 10%
ethanol.
Blend of gasoline and MTBE
- Anti-knock index must be 87 AKI or high er. ..,.
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