248
Fuel supply
and filling
your fuel tank
Fuel supply
and filling
your fuel tank
Fuel supply
Gasoline
Appl ies to vehicles: with gasoline engine
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. Audi recom-
mends using TOP TI ER Det ergent Gasoli ne
wit h a minimum octane rat ing of 9 1 AKI (95
RON). For more inform at ion on TOP TIER De-
tergent Gasoline, please go t o t he off icial
websi t e (www.t opt iergas.com) .
The recommended gasoline octa ne rating for
your engine can also be f ound on a label locat-
ed on the inside of the f uel filler flap . This rat-
ing may be specified as AKI or RON.
Your veh icle 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 octa ne fue l wi ll slightly re-
duce eng ine perfo rmance .
Use unleaded gasoline only. Unleaded gaso-
li ne 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 mo re informat ion on refue ling your vehi-
cle, see ~
page 250.
Octane rating
Octane rating ind icates a gasoli ne's ability to
resist engine dam aging "kno ck" caused by
premature ign ition and detona t ion. Therefore,
buying the correct grade of gasoli ne is very
important to help 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
ratings t hat 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 Oct ane Number
MON = Motor Octane Number.
(D
Note
- Do not use any fue l w it h octane rat ings
lower tha n 87 AKI or 91 RON othe rwise
expensive engine damage w ill occur.
- Do not use leaded gasoline. The use of
leaded gasoline w ill severely damage
yo ur vehicl e's catalytic converter and its
ability to control exhaust em issions .
Blended gasoline
Applies to vehicles: with gasoline engine
Use of gasoline containing alcohol or
MTBE (methyl tertiary butyl ether )
You may use unleaded gasoline blende d wit h
alcohol or MTBE (commonly referred to as
oxygenates) if the blende d mixture meets t he
f oll ow ing criteria:
Blend of gasoline methanol (wood alcohol or
methyl alcohol)
- Anti -kno ck index must be 87 AKI or higher.
- Blend must contain no more t han 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 mo re tha n 15%
ethanol.
Blend of gasoline and MTBE
- Anti-knock index must be 87 AKI or higher.
IJll,