2021 AUDI A8 fuel additives

4N0012721BF
Checking and Filling

Checking and Filling
Fuel
Types of gasoline
The correct gasoline grade is stated on the inside
of the fuel filler door.
The vehicle is equipped with a catalytic converter
and must only be driven with unleaded gasoline.
Audi recommends using TOP TIER Detergent Gas-
oline. For additional information on TOP TIER De-
tergent Gasoline, visit www.toptiergas.com.
The individual gasoline grades are differentiated
by octane ratings. This value is given with (R
+M)/2 equating to AKI or in RON.
The headings below match the sticker in the fuel
filler door (examples):
UNLEADED FUEL ONLY MIN. (R+M)/2 87
Regular / MIN. RON 91 Regular
Use regular gasoline with minimum 87 AKI /
91 RON > ©.
Audi recommends using premium gasoline with
minimum 91 AKI/ 95 RON to achieve the rated
horsepower and torque.
UNLEADED FUEL ONLY PREMIUM MIN. (R
+M)/2 91 / SUPER MIN. RON 95
Using premium gasoline with minimum 91 AKI /
95 RON is recommended.
If premium gasoline is not available, you can also
use regular gasoline 87 AKI / 91 RON. However
this does reduce the engine power slightly.
UNLEADED FUEL ONLY PREMIUM MIN. (R
+M)/2 93 / SUPER PLUS MIN. RON 98
Using premium plus gasoline with at least 93
AKI / 98 RON is recommended.
If no premium plus gasoline is available, you can
also use premium gasoline with 91 AKI /95 RON.
However this does reduce the engine power
slightly.
CG) Note
— Filling the tank just one time with leaded
fuel or other metallic additives will cause
permanent deterioration to the catalytic
converter function.
— When gasoline with an octane rating that is
too low is used, high speeds or heavy engine
load can lead to engine damage.
@ Tips
The vehicle may be filled with fuel that has a
higher octane rating than what is required by
the engine.
Gasoline mixture
Gasoline with alcohol or MTBE (Methyl-Tert-
Butyl-Ether)
You can use unleaded gasoline mixed with alco-
hol or MTBE (generally labeled as oxygenated
compounds) as long as the fuel meets the follow-
ing conditions:
Gasoline with methanol content (methyl alco-
hol or methanol)
— Anti-Knock Index is at least 87 AKI
—No more than 3% methanol
— More than 2% solvent
Gasoline with ethanol content (ethyl alcohol or
ethanol)
— Anti-Knock Index is at least 87 AKI
—No more than 15% ethanol
Gasoline with MTBE content
— Anti-Knock Index is at least 87 AKI
—No more than 15% MTBE
Gasoline adapted to the season
Many gasoline fuels are adapted to the seasons.
When the season changes, refueling at high-traf-
fic gas stations is recommended. It is more likely
that the gasoline will be suitable for the season
there.
@) Note
— Gasoline with methanol content that does
not meet the specified conditions may cause >
269

Checking and Filling

corrosion damage and damage to plastic or
rubber components in the fuel system.
— Do not use gasoline that does not meet the
specifications.
— If you are unable to find out if a specific gas-
oline mixture meets the specifications, ask
the gas station operator or their fuel suppli-
er.
— Do not use any gasoline mixture whose
composition cannot be identified.
— Audi does not assume any responsibility for
damage to the fuel system or for perform-
ance problems caused by using gasoline
mixtures different from those specified.
This type of damage also does not fall under
the New Vehicle Limited Warranty or under
the emissions control system warranty.
— If you notice a higher fuel consumption or
poor handling or performance problems due
to such gasoline mixtures, Audi recom-
mends fueling with unblended gasoline.
Gasoline additives
An important issue for many automobile manu-
facturers is combustion residue in the engine
that results from the use of certain fuels.
Although types of gasoline differ depending on
the manufacturer, there are similarities. Certain
substances in the gasoline may cause deposits in
the engine. Additives in the gasoline that should
keep the engine and fuel system clean do not all
function equally.
Audi recommends using TOP TIER Detergent Gas-
oline. For additional information on TOP TIER De-
tergent Gasoline, visit www.toptiergas.com.
If you use incorrect fuels over a long period of
time, the maximum engine performance may be
impaired by combustion residue.
@) Note
— Damage or malfunctions caused by the use
of incorrect types of gasoline are not cov-
ered by the New Vehicle Limited Warranty.
— Only gasoline additives that have been ap-
proved by Audi may be used.
270
Refueling
Messages
A Tank system: malfunction! Please contact
Service
There is a malfunction in the fuel tank system.
Drive to an authorized Audi dealer or authorized
Audi Service Facility immediately to have the
malfunction corrected.
Messages
Applies to: vehicles with plug-in hybrid drive
A Fuel filler door: malfunction! Unlock fuel
filler door manually. See owner's manual
There is a malfunction. You must manually un-
lock the fuel filler door > page 273.
Al Warning! Vehicle performance may be limit-
ed
The fuel tank is almost empty. You must antici-
pate a significant power loss. Refuel immediate-
ly.
& Please refuel and charge battery. Total
range: x mi (km)
or
f& Tank system: please refuel immediately and
charge battery. Total range: x mi (km)
If this indicator light turns on and this message
appears, refuel as soon as possible. Otherwise,
the high-voltage battery is drained > page 131.
AY Fuel filler door open. Please press button
again to refuel
Fueling is possible for a little while after pressing
the G) button. You must press the A button
again if the time limit is exceeded.

4N0012721BF
Index

Engine sound
Audi drive select.......... 0.00 eee eee 124
Engine start system..................0. 108
Engine stop
refer to Start/Stop system............. 117
Entry/exit lighting. ..............0eeee ee 61
Entry assistance.................-0 020s 73
also refer to Exit assistance............. 73
Environment
Unleaded gasoline................200. 269
ES@
refer to Electronic Stabilization Control... 129
ESG:SPOltis ss wees es serow so ens x e ewe ze 130
eSIM
refer to Embedded SIM card............ 223
Event Data Recorder (EDR).............. 333
EVimOde » wes s pasa 3 wuss os wee 6 = see 5 115
EXit:aSSiStani@Giis « x comm « < ems « RGERS eS 73
Exit Warning’: « s sos © ¢ wea © i eews oy Rees 184
Exterior antenna...............0..000. 212
Exterior lighting................0022-00. 58
Exterior mirrors... ........0..0.00000005 64
FOLGING'SELtINGSi: + x sams ¢ s sue x eee Ya: 42
External voice operation..............0.5 35
F
Factory default settings
Multi Media Interface................. 264
Factory settings
Rear:Seat: Remote .. seices és iiss oo ones oo 263
Fast rOUtC sess + eeu 2 2 gow sv cere oe ee 231
Favorites: < 2 vw ¢ 2 esis < ¢ dees + enews oon 22
Bluetooth « « scons 2 a swavwne x 2 awaene © event we © oe 266
Navigation... ........ 00. c cece eee eee 232
Telephoti@s:s: = « aae¢ = oven & s seem os ree 215
Federal Communications Commission (FCC) . 341
File formats (media drives).............. 258
Fog (windows) ...........00ee ee ee ee eee 102
Folding
tray table............0....000 00. 96
FOOCHEATIAG sioncase x 0 veces: + 6 asians «a seman © Hane 102
Footrests initeat's « + sesscea 0 2 omen a 2 own 9 w one 77
Footwell temperature.................. 103
For the sake of the environment
Disposing of engine oil................ 280
FUGUING:: < = sews 2 2 wows x o eee ge eee Fo ee 271
L@AKS boxe smansos x samen ow menos we aun a 275
FAQKaNG@rsces 2 o sce 2 o sees oo sR oo 102, 103
Free text search
Mediai. 2 2 sssxass a 0 sananis wo oreness 6 H emeneen & a1 ene 257
Radio... 2.2.2... eee eee eee eee eee 245
also refer to Intelligent search.......... 231
Freeze protection
COOLANE scsnis av aaneiss 6 4 insunse aw aves & 8 eswIEHE 281
Windshield washer system............. 287
Frequency band...............--000 ee 242
also refer to Frequency band........... 242
Front center armrest...............0.00. 73
Front collision warning
refer to Audi pre sense front............ 178
Front passenger's seat adjustment
R@ar : saws ¢ + eae ¢ » ews so meee st se es oe 75
Front passenger’s seat adjustment
PrOmtis 2 2 soveas 2 a ravens oe awe 2 a mee 2 x eNO 73
Rear... eee eee 73
Front wiper blades
Changing................0.00 ee eee eee 67
ClOANiNG’s « = seas a o ses + o sews so ews ev Ge 67
FUl@ls aguas 3 = imue x 2 eae ¢ EEE FE BEE ea 269
INAGIEIVE Se cecscics ow casi 2 ws amano © ctawais We oe 270
Current consumption...............000. 16
Fuel QaUg@ asx ¢ < oes « v ness sp rere se ee 12
Fueltankicapacity’ « s scsi «6 meow © waco « 344
Gasoline. 0.1... cece eee 269
Reducing fuel consumption............ 116
Fueling
Fuel filler GOOF ox « « cawy 6 ewes 2s yews ss 2 271,
Fuel filler door emergency release....... 273
Fuel tank capacity... ...... eee eee eee 344
G
Garage door opener............--000000- 55
Garment hooks ..............0000eee eee 97
GaSOL Meise ue a sxsweme 1 = anemaine = 5 onetime ws cemntene fe 3 269
Additives... 0.0.0.0... cc cece eee ee eee 270
Gasoline MIRCUNE wee 2» yew 2 o sews + same 269
GAWR
refer to Gross Axle Weight Rating (GAWR) . 344
GeaTsis « o scsn +s men 2 2 neon 2 rece Y oe 349