2008 AUDI S8 mileage

fl::. WARNING (c o ntinue d)
• Wo rk with d ue care when handl in g th e high -v o lt age secti on of
gas disc harge !xe non) lig ht s. Fa ilur e to d o so c ould re sult i n de ath
or seriou s injur y.
[ i J Tips
Have the bulb replaced or the connection repaired by your autho ­
rized Aud i Service department .•
Service interval display
The service interval display reminds you when your next
service is due.
Fi g. 14 D isplay:
Se rvice i nterval displ ay
The date for service is calculated automa tically. Based on the
average distance driven in previous months, a monthly driving
distance is calculated. As soon as the distance remaining to the next
service drops below the distance driven monthly, the service
reminder is initiated. The maximum period from one service to the
next is one year.
S erv ice reminder
30 days before the next service is due, a service reminder appears
in the display when you turn on the
i gnition => fig. 14.
Contro ls a nd eq uip­
ment
Dr ive r inf ormati on d ispl ay
After about 5 seconds the display switches back to normal. The
distance and time remain ing are updated each time the ignition is
turned on unti l the date due for service is reached.
Servi ce
When the due date for service is reached, the message Serv ice due
! appears in the disp lay immediately after you turn on the ignition.
Additionally, a warning tone sounds. After about 5 seconds the
display switches back to normal.
0 Note
I f you disconnect the battery terminals, no calculations can be
made for the service interval display during this time and no service
reminder will appear. Remember that observing the proper service
intervals is vita lly important to extending the life of you r vehicle,
particularly the engine, and maintaining its value. Even if the
mileage driven is low, the maximum period of one year from one
service to the next must not be exceeded. •
On-Board Diagnostic system (OBD)
Malfunction Indicator Lamp (MIL)
The Malfunction Indicator Lamp (MIU in the instrument cluster
=> page 16, fig. 7 is part of the On -Board Diagnostic (OBD II) system.
The warn ing/indicator light illum inates when the ignition is
switched on and goes out after the engine starts and the idle has
stabilized . This indicates that the MIL is working properly.
If the light d oes not go out after the engine is started, or illuminates
while you are driving, a ma lfunction may exist in the engine system.
If the light starts flashing, the catalytic converter cou ld be damaged.
Continue driving
w ith redu ced po wer (avoiding sustained high
speeds and/or rapid accelerat ions) and have the condition
corrected. Contact your authorized Audi dea ler.
Vehicle care I I irechnical data

Driver information display
-Select Instrument cluster. The In strument cluster menu
appears .
Select the second item in the
Speed warning menu. The
submenu
Speed threshold appears ~ page 37, fig. 20.
Set the warning threshold you want .
Warning threshold 2 can only be set in a speed range from 20 to
150 mph (30 to 240 km/h). •
Trip computer
Introduction
The trip computer gives you information on current and
average fuel mileage, average speed, fuel range and
driving time.
Fig. 21 Trip comput er
di sp lay : Average fuel
mil eage
The following driving information is continuously evaluated by the
trip computer and can be displayed sequential ly in the instrument
cluster display.
Fuel range
The estimated cruising range in miles (km) appears in the display.
This tells you how far your vehicle will be able to travel on the current tank of fuel and with the same driving style. The display
changes in increments of 6 miles (10 kml.
The cruising range is calculated based on the fuel consumption for
the last 18 miles (30 km). If you drive conservative ly, the cruising
range will increase.
Average fuel mileage
The average fuel economy in MPG (1/100 km) since you last cleared
the memory appears in this display . You can use this disp lay to
adjust your driving technique to achieve a desired mileage .
Current fuel mileage
The instantaneous fuel consumption in miles per gallon (1/100 km)
is shown in this display. You can use this display to adjust your
driving technique to achieve a desired mileage.
Fuel consumption is recalculated at interva ls of 33 yards (30
metres). When the vehic le is stationary, the most recent fuel
consumption is displayed.
Average speed
The average speed in mph (km/h) since the last time the display was
reset appears in the display.
Elapsed time
The length of time that you have been driving since you last reset
the memory appears in this display .
[ i] Tips
• Fuel consumptions (average and current), range and speed are
displayed in metr ic units on Canadian models.
• All stored values will be lost if the vehicle battery is
disconnected .•

Memories
The trip computer is equipped with two fully automatic
memories.
Fig . 22 Trip computer
display: memory level 1
You can switch between the trip computer 1 and 2 by pressing the
Reset button
@ =>fig. 23.
You can tell which memory level is currently active by the number in
the
display => fig. 22. The data from the single -trip memory
(memory level 1) is being displayed if a
1 appears. If a 2 is shown,
then the data from the total -trip memory is being displayed
(memory level 2).
Single-trip memory (Trip computer 1)
The single-trip memory stores the trip information from the time the
ignition is turned on until it is turned off. If the trip is continued
within 2 hours from the time the ignition was turned off, the new
data will be included in the calculation of the current trip informa ­
tion. If the trip is interrupted for
more than 2 hours the memory is
reset automatically .
Total-trip memory (Trip computer 2)
Unlike the single-trip memory, the total -trip memory is not reset
automatically . This permits you to evaluate your driving data for the
entire period between manual resets .•
Contro ls a nd eq uip­
ment
Driver information display
Operation
The trip computer is controlled by two switches on the
windshield wiper lever.
Fig. 23 Windshield
wiper lever : controls
for the trip computer
Push the function selector switch up or down @
~ fig. 23. This will cause the five distinct trip computer
functions to be displayed one after another.
The trip computer only operates when the ignition is on. When you
turn on the ignition, the function that was in use when you last
turned the ignition off will be displayed.
In addition to the trip computer information (memory level 1 or 2) ,
navigation information and Adaptive Cruise Control * information
can be displayed . To switch the display between the different
systems, tap the Reset button
@ briefly.
Setting values to zero
To delete one current value from the trip computer, select the
desired function and press the Reset button @ for at least one
second. The following values can be set to zero
individually using
the Reset button:
• elapsed time
• average fuel mileage
• average speed
Vehicle care I I Technical data

______________________________________________ D_ ri_v _ i_ n _, g..,_ a_ n_d _ e_ n_ v_i_ro _ n_ m_ e_ n_t __ ffllll
- Lack of proper maintenance as wel l as improper use of the
vehic le will impair the func tion of the emission con tro l system
and cou ld lead to damage .
<£> For the sake of the envir onment
Even when the Emission Control System is operating properly, the
exhaust gas can have a su lfur -like exhaust gas smell under some
operating states . This depends on the sulfur content of the fuel
being used. Using a different b rand of fue l may help, or fil ling the
tank with lead-free super grade gasol ine. •
Avoid damaging the vehicle
When you are driving on poor roads, or over curbs, steep ramps,
etc., make certain that low- lying parts such as spoi lers and exhaust
system parts do not bottom out and get damaged.
T his is especial ly true for vehicles with low -s lung chassis (sports
chassis)* and ful ly loaded vehicles .•
Operate your vehicle economically
and minimize pollution
General
Y o ur personal style of driving will determine the economy
of your vehicle , as well as exhaust and noise levels.
Fuel economy, environmenta l impact, and wear on your engine,
brakes and t ires largely depend on three factors :
• your personal driving style
• operat ing cond it ions
• t echnica l limitations
Controls and equip­
ment Safety first Vehicle operation
I
f you anticipate what you need to do next and drive economica lly,
you can eas ily cut your fuel consumptio n by 10 -15 percent . This
section wil l give you some tips on how you can help the environ­
ment and your poc ketboo k.
[ i ] Tips
The consumption estimates as published by ENV IRO NME NTA L
PRO TECTION AGENCY (EPA) and Transport Canada may not corre ­
spond to your actua l consumption on the road, which wi ll vary
depe nding upon veh ic le load and speed, road and weather condi­
tions, trip length, etc. •
Drive smoothly and keep a lookout ahead
Vehicles use the most fuel when they ore accelerating .
-Avo id unnecessary accelerat ing a nd braking .
Vehicles use the most fue l when they are accelerating . If you antici ­
pate what is going to happen
ne xt, you wi ll need to brake less and,
thus, acce lerate less. Let the vehicle coast whenever possib le -for
examp le when you see that the next traffic light is red. •
Avoid full throttle
Driving at moderate speeds saves fuel and improves your
mileage.
- Try and keep we ll below your car 's max imum speed.
Acce lerating gently reduces fue l consumption, engine wear, and
does no t disturb the envir onment.
Fue l consumption, exhaust emissions and engine noise increase
dispropo rtionately at h ig h speeds . If yo u drive at approxi mate ly
three quarters of top speed, fuel consumpt ion wil l be reduced by
~
Vehicle care Do-it-yourself service Technical data

ffl.,__ __ D_r_ i_v _i_n _.g..,_ a_ n_d_ e_ n_v _ i
_ r_o _ n_ m_ e_ n_ t _______________________________________________ _
one half. Never drive faster than the posted speed limit and weather
co nditions permit. •
Reducing unnecessary idling
Even when your car is just idling it burns up fuel.
- Shut the eng ine off when you are not driving the vehicle .
- Do not warm up the vehicle by letting the engine run at
id le .
It makes sense to shut off the engine in traff ic jams, when waiting
for trains to pass at rai lroad crossings, or at traffic lights that have
long waits on red. Turning the engine off for just 30 -40 seconds
saves more fue l than is burned starting the engine again .
It takes a long time for the engine to warm up fu lly when it is
running at idle. However, wear and noxious em issions are espec ially
high when the engine is warming up . So you should drive away as
soon as you start the engine and avoid running at high rpms while
the engine is sti ll warming up.
0 Note
Do not leave engine idling unattended after starting . If warning
lights should come on to indicate improper operation, they would
go unheeded. Extended idling also produces heat, which could
result in overheating or other damage to the vehicle or other
property .•
Regular maintenance
A badly tuned engine unnecessarily wastes a lot of fuel.
- H ave your vehicle serviced at regular intervals .
By having your vehicle regularly serviced by an Audi dealer helps to
ensure t hat it runs properly and economical ly . The condit ion of your
vehic le not only affects its safety and abi lity to hold its va lue, it also
affects
fuel con sumpt ion .
C hec k your oil each time you fill your tan k.
The amount of oil used is related to engine load and speed.
I t is norma l for the oi l consumption of a new engine to reach its
lowest va lue after a certain mileage has been driven.
You must drive your vehicle about 3,000 miles (5,000 kilometers) before you can properly assess oil consumption .
T his also applies to fuel consump tion and engine output .
0 Note
• Have your vehicle maintained properly and in accordance with
t he service recommendat ions in your Warranty
& Maintenance
booklet. Lack of proper ma intenance as well as improper use of the
vehic le wi ll impair the function of the emission control system and
cou ld lead to damage.
• Do not alter or remove any component of the Emission Contro l
System unless approved by the manufacturer.
• Do not alte r or remove any device, such as heat sh ields,
switches, ignition wires, valves, which are designed to protect your
vehic le's Emission Control System and other important vehic le
components .•
Fewer short trips
Fuel consumption will always be relatively high on short
trips.
- Try to avoid driving short dista nces with a cold engine. ~

_____________________________________________ C_h_ e_ c
_ k_in --= g'-a
_ n_d _ f_il _li _n ..::g ::.-__.ffllll
& WARNING
B efor e you che ck an ything in the eng ine comp artm ent, a lw ays
read and heed all WARN ING S
~ & in "W orkin g in the engin e
c omp artment " on
page 30 7. •
Appl ies to vehicles: with 12- cy linder engine
Engine compartment overview : 1 2-cyl inder
engine
These are the most important items that you can check.
F ig . 262 Ty pi cal layout for c ontain ers, en gine oil dip st ic k a nd e ngine o il filler
ca p
G) Windshield/head light washer container ( Q ) . . . . . . . . 323
@ Brake fluid reservoir ( ) . . . . . . . . . . . . . . . . . . . . . . . . 317
© Engine oi l dipstick (orange) . . . . . . . . . . . . . . . . . . . . . . 311
© Engine oil filler cap ('t=:11) .. ...... .... ... ... ... .. . .
© Coolant expansion tank (- L l ..................... .
& WARNING
Before you check anything in th e engine co mpartment , alway s
read and he ed all W ARNI NGS
~ & in "Wo rking in t he engin e
c ompartm ent " on
page 307.
[ i ] Tip s
The coolant expansion tank is located under a cover .•
Engine oil
Engine oil specifications
312
315
The engine oil us ed in your Audi needs the right kind of
oil.
The engine in your Audi is a sophisticated powerplant that was built
to exacting specifications. This engine needs the right kind of engine oil that meets specifications regarding quality and viscosity
so that it can run smoothly and re liably. Choosing the righ t oil and
changing oil within the time and mileage interva ls printed in your
vehicle's Warranty
& Ma intenance book let matters a lo t more today
than it did years ago. Audi has developed a special quality standard
for engine oil that wil l help assure that your vehicle's engine wi ll get
the lubrication it needs for proper operation .
Mode rn engine lubrication has taken a quantum leap in the last few
years . Many syn thetic oils available today provide better engine
lubrication that can outlast traditional petroleum-based oils,
making them a smart choice for use throughout the life of your Audi.
Whether you use synthetic or petroleum -based engine oil, the oi l
that you use must conform to Audi's oi l qua lity standard VW 502 00
..,
Vehic le care I I irechnical data

___ C_ h_e _c _ k_ i_ n ~g~ a_ n_ d_ f_ i_ll _in _g~--------------------------------------------
to help keep your vehicle's engine running smoothly and help
prevent the formation of harmfu l deposits, sometimes called
"sludge, " that over time can lead to expensive repairs .
At the time of printing, engine oils available in the U.S. and Canada
that meet the exacting specificat ions of Audi oil standard VW 502 00
are synthetic engine oils. This does not mean, however, that every
synthetic engine oil will meet Audi oi l standard VW 502 00. So
a lways b e sur e that you use an approved oil.
To help prevent the formation of harmful deposits use only oi l with
the following specifications printed on the oil container :
Audi oil sta nda rd VW 502 00
Oil container labels may carry the specification singly or in combi­
nation with other designations and oil quality standards.
V iscosi ty
Engine oi ls are graded according to their viscosity . The proper
viscosi ty grade oi l for your engin e depends on climactic or seasonal
conditions where you drive . You can use o il with a v iscosity grade of
SAE 5W40 across all temperature ranges for normal driving condi­
tions.
However , if eng ine oil viscosity grade SAE 5W40 is not available, you
can a lso use viscosity grade SAE 5W -30 or SAE 0W -40 as long as it
meets Audi oil quality standard VW 502 00 specifications.
B ecause engin e oil that meets the Audi oi l standard may not be
avai lable everywhere when you need it, we strongly recommend
that you a lways carry with you an extra quart !liter) of oil that
express ly conforms to t he VW 502 00 specification, in case you have
to top off the oil while on the road.
Only if th e level of the oil is at or be low the minimum mark on the
oi l dipstick -and no oil that express ly conforms to Audi oi l standard
VW 502 00 specifications is avai lable -may you top off with a high
quality engine oi l, preferably synthetic -based, that meets ACEA A3,
ACEA A5 or ACEA B5, API SL or ILSAC GF -3 specifications , but even
t hen, only in viscosity grades SAE 5W -40, SAE 5W -30, or SAE 0W -40.
However, during the entire time betwe en oil change int erva ls, nev er top off with more than a total of 0
.5 qt/ liter engine oil that does not
conform to Audi oil specifica tion VW 502 00.
For more information about engine oil that has been approved for
your vehic le, please contact either your authorized Audi dealer or
Aud i Customer Relat ions at 1 (800) 822-2834 or v isit our web s ite at
www.audiusa.com or www.audicanada.ca. Here you will also find a
current list of o ils (manufacturers, brand names
etc.I that conform
to Audi oi l standard VW 502 00.
Ch an g in g t he en gin e oil
The engine oil and o il filter must be changed according to the
mileage (ki lometers) and time intervals specified in your vehic le 's
Warranty & Maintenance booklet . Do not exceed these intervals -
harmful deposits from old engin e oil can reduce engin e perfor­
mance and can lead to expensive eng ine repa irs.
Changing the oil at the recommended intervals is so very impor tant
because the lubricating properties of oi l decrease gradua lly during
normal vehicle use. If you are not sure when you have your o il
changed, ask your authorized Audi Service Advisor.
Under some circumstances the eng ine oil should even be changed
mor e frequen tly . Change oil more oft en if you drive most ly short
distances, operate the vehicle in dusty areas or mostly under stop ­
and -go traffic conditions, or when you use your vehicle where
t emperatures stay be low freezing po int for long per iods .
Detergent add it ives in the oi l wi ll make fresh oil look dark after the
engine has be en running for a short time. This is normal and is not
a reason to change the oi l more often than recommended .
Dam age or malfun ction s du e to lack of m aint enan ce
It is essential that you change your oil at the recommended interva ls
using on ly engine oil that complies with Audi oil standard
VW 502 00. Your Limited New Vehicle Warranty does not cover
damage or malfunctions due to fai lure to follow recommended
maintenance and use requirements as set forth in the Audi Owner's
Manual and Warranty
& Maintenance booklet. Your dea ler wi ll have
to deny warranty coverage un less you pr esent to the dea ler proof in
.,_

Checkin g and fillin g 1111
-------------~~~
•
the form of Service or Repair Ord ers that all scheduled maintenance
was perfo rmed in a t imely man ner. •
Engine oil consumption
The engin e in your vehicle d ep ends on an adequate
amount of oil to lubricate and cool all of its moving parts.
In order to provide effect ive lubrication and cool ing of internal
engine components, all internal combustion engines consume a
certain amount of o il. Oil consumption varies from engine to eng ine
and may change significantly over the life of the engine . Typically,
eng ines wi th a specif ied break -in period
(see => page 2771 consume
more oil during the break -in period than they consume after oi l
consumption has stabi lized .
Under normal conditions, the rate of oil consumption depends on
the quality and viscosity of the oil, the RPM (revolutions per minute)
at which the engine is operated, the ambient temperature and road
conditions. Further factors are the amount of oil dilution from water
co ndensation or fue l residue and the oxidation level of the o il. As
any engine is subject to wear as mileage builds up, the oil consump ­
t io n may increase over time until rep lacement of worn components
may become necessary .
With all these variables coming into play, no standard rate of oil consu mption can be estab lished or specified. T here is no a lternative
to regular and frequent checking of the oil level, see
Note .
If the yellow eng ine o il level warni ng symbol in the instrume nt
cluster ~ lights up, you should check the oil level as soon as
poss ible
with the oil dipstick => page 311 . Top off the oil at your
earliest
convenience=> page 312.
& WARNING
Bef ore you che ck anything in the eng ine comp artment , alw ay s
read and heed all WARNINGS
=> & in "Working in the engine
c ompartment " on
page 307 .
0 Note
Driving with an insuff ic ie n t o il level is l ikely to cause severe damage
to the engine.
[ i ] Tip s
• The oil pr es sure warning displ ay level . Do not rely on it. Instead , check the oil level in your engine at
regular inter vals, preferably ea ch time you refuel , and al ways before
going on a long trip.
• I f you have the impression your engine consumes excessive
amounts of oi l, we reco mmend that you consult your Audi dealer to
have the cause of your concern properly diagnosed . Keep in mind
t hat t he acc urate measureme nt of oil consump tion requ ires g reat
care and may take some time. Your Audi dealer has instructions
about how t o measure oil consumpt ion accurately. •
Checking the engine oil level
Vehicle care
Fig. 26 3 Illu stration of
prin cipl e 1: Mar ker s on
o il dip sti ck ...