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Che
ck
ing and Fill in
g
Checking
and Filling
Gasoline
Fuel supply
Applies to vehicles: with
gasoline
engine
Using the right fuel helps keep the environment
clean and prevents engine damage.
Fuel re co
mm
e
ndation
The fuel recommended for your vehicle is
unlead-
ed premium
grade
gasoli
ne. Audi recommends
using TOP TIER Detergent Gasoline with a mini-
mum octane rating of 91 AKI (95 RON). For more
information on TOP TIER Detergent Gasoline,
please go to the official website
(www.toptiergas .com).
The recommended gasoline octane rating for
your engine can also be found on a label located
on the inside of the fuel filler flap
.
This rating
may be specified as AKI or
RON.
Your vehicle may also be operated using unlead-
ed regular gasol ine with a minimum octane rat
-
ing of
87 AKl/91
RON.
However, using
87 AKI/
9
1
RON octane fue
l
wi
ll
slight ly reduce engine
performance.
Use unleaded
gasoline only.
Unleaded gasoline
is available throughout the USA, Canada, and in
most European countries. We recommend that
you do not ta ke you
r
vehicle to areas or countr ies
where unleaded gasoline may
not
be available.
For more informat ion on refueling your veh icle,
see
¢page 192
.
Octan
e
rat ing
Octane rating indicates a gasoline's ability to re-
sist engine damaging "knock" caused by prema-
ture ignition and detonation
.
Therefore, buying
the correct grade of gasoline is very important to
help prevent possible eng ine damage and a loss
of engine performance.
Gasoline most commonly used in the United
States and Canada has the following octane rat-
ings that
can
usually be found on the filler pump:
-
Premium
Grade:
91 - 96 AKI
190
- Regular Grade: 87
-
90 AKI
Explanation of the abb reviations:
AKI
=
Anti Knock
I
ndex
=
(R+M)/2
=
(RON+MON)/
2
RON= Research Octane Number
MON
=
Motor Octane Number.
{[)
Note
-
Do not use any fue
l
w ith octane rat ings low-
er
t
han 87 AKI or 91 RON otherwise expen-
sive engine damage w
ill occur.
-
Do
not
use leaded gasoline. The use of lead-
ed gasoline will severely damage your veh i-
cle's catalytic converter and its abi lity to
control exhaust em issions.
Blended gasoline
Appli
es to vehicles: wit
h gasolin
e engi ne
Us
e of g as
oline
cont
ai
ning alcohol or MTBE
(meth yl tert
iary
but yl ethe
r)
You may use unleaded gasoline blended with al-
cohol or
MTBE
(commonly referred to as oxygen-
ates) if the ble nded mixture meets the following
criteria:
Blend of gasoline methano
l
(wood alcohol or
met hyl alcoho
l)
-
Anti -knock index must be 87 AKI or higher.
-
Blend must contain no more than 3% metha-
nol.
- Blend must contain more than 2% co-solvents.
Blend of ga
soline
and ethan
o
l (grain alcohol or
ethyl alcohol
)
- Anti-knock index must be 87 AKI or higher.
-
Blend must not conta in more than 15% etha-
nol.
Blend of ga soline and MTBE
-
Anti-knock index must be 87
AKI
or higher.
-
Blend must contain not more tha
n
1S%
MTBE.
Seas
o nally
adjust ed gasoline
Many gasoline grades are blended to perform es-
pecially well for winter or summer dr iving
.
Dur-
ing seasonal change-over, we suggest tha
t
you
.,..
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