Fuel Supply And Filling Your; Gasoline - Audi A8 2015 Owner's Manual

220 Fuel supply and filling your fuel tank
Fuel supply and filling
your fuel tank
Gasoline
Fuel supply
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 gasoline . Audi recom-
mends using TOP TI ER Det ergent Gasoli ne
with a minimum octane rat ing of 9 1 AKI (9 5
RON). For more informa t ion on TOP TIER De-
tergent Gasoline, please go t o t he officia l
websi t e (www.t opt iergas.com) .
The recommended gasoline octane rati ng 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 specif ied 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-
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 mo re informat ion on refue li ng your vehi-
cle, see ~ page 222.
Octane rating
Octane rating ind icates a gasoli ne's abili ty t o
resist eng ine dam aging "knoc k" 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 = Ant i Knock I ndex = (R+M)/ 2 = (RON
+MON)/2
RON= Research Oct ane Numb er
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 engi ne damage w ill occur.
- Do not use leaded gasoli ne. The use of
leaded gasoline w ill severely damage
yo ur vehicle'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 10%
ethanol.
Blend of gasoline and MTBE
- Anti-knock index must be 87 AKI or higher.
IJll,