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Fuel and Refueling
Fuel and Refueling
Fuel
Fuel supply
Using
the
right fuel helps keep the
environment
clean and prevents
engine
damage.
Fuel
recommendation
The fuel recommended for your vehicle is
unlead-
ed premium
grade gasoline. 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 AK
I
or RON.
Your vehicle may also be operated
using unlead-
ed
regular gasoline with a minimum octane rat-
ing of 87 AKl/91 RON
.
However, using 87 AKI/91
RON octane fuel
will
slightly
reduce
engine per-
formance.
Use
unleaded
gasoline
only.
Unleaded
gasoline
is available
throughout
the USA, Canada, and in
most European
countries
.
We
recommend
that
you do
not take
your vehicle
to
areas
or countries
where un leaded gaso line
may
not
be available.
For
more information
on refueling your vehicle,
see
r::;,
page 188.
Octane rating
Octane rating
indicates
a gasoline's ability to re-
sist engine damaging "knock" caused by prema-
ture ignit ion and detonation
.
Therefore, buying
the
correct grade of gasoline is very important
to
help prevent poss ible engine 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
-
Regular Grade:
87 -
90 AKI
186
Explanation
of the abbreviations:
AKI= Anti Knock
Ind
ex= (R+M)/2
=
(RON
+MON)/
2
RON=
Research Octane Number
MON=
Motor
Octane
Number.
CJ)
Note
-
Do not
use
any fue
l
with octane
ratings low-
er than
87 AKI or
91 RON otherwise expen-
sive engine
damage
will occur.
-
Do
not
use
leaded
gasoline.
The
use
of
lead-
ed
gasoline will severely damage your vehi-
cle's catalytic converter and its ability to
control exhaust emissions.
Blended gasoline
Use of gasoline
containing
alcohol or MTBE
(methyl
tertiary butyl
ether)
You may use unleaded gasoline blended with al-
cohol
or
MTBE (commonly
referred
to as
oxygen-
ates) if
the blended
mixture meets the
following
criteria:
Blend of
gasoline
methanol (wood alcohol or
methyl alcohol)
- 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 gasoline and
ethanol (grain
alcohol
or
ethyl
alcohol)
- Anti-knock
index must
be
87 AK
I
or
higher.
-
Blend must not
contain
more than
15%
etha-
nol.
-
Vehicles with flexib le fue
l
eng ine:
blend
must
not contain
more
than
85%
ethanol.
Blend of gasoline and MTBE
-
Anti-knock index must be 87 AKI or
higher.
-
Blend must contain not more than
15% MTBE.
Seasonally
adjusted
gasoline
Many gasoline grades are blended to perform es-
pecially
well for winter or summer driving
.
Dur-
ing seasonal change-ove r, we suggest that you
.,.
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