2021 AUDI Q8 fuel additives

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.
238
@) 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 >

4M8012721BF
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.
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.
Fueling procedure


Fig. 154 Right rear side of the vehicle: opening the fuel
filler door



Fig. 155 Fuel filler door with attached fuel cap
The fuel filler door is unlocked or locked by the
central locking system.
> Unlock the vehicle if necessary.
> Press on the Left side of the fuel filler door to
open it > fig. 154.
> Unscrew the tank cap counterclockwise.
> Place the cap from above on the open fuel filler
door > fig. 155.
> Insert the fuel pump nozzle all the way into the
fuel filler neck.
> Begin fueling. Once the fuel pump nozzle turns
off the first time, the fuel tank is full. Do not
239
>

4M8012721BF
Index

External voice operation................. 29
F
Factory default settings

Multi Media Interface................. 234
EASE OUTS sissses ow snaawee 0 x sons #9 seme a 0 onennns 201
FAVORITOS! & o cowsms w 6 cman 6 8 semua & wexees & renee 22
Bluetooth. .............. 0... eee eee 236
NaVIG@EION:: « + swe 9 o eee 5 ¢ oem & e eee 202
Telephone wwe «x cain © aesee e+ ence oo eee 186
Federal Communications Commission (FCC) . 311
File formats (media drives).............. 228
FOg (WINdOWS)ixw: 5 2 came y 5 anew ay aeew 5 2 Re 92
Folding the rearseats...............0005 86
Footwell temperature.............2.0005 93
For the sake of the environment
Disposing of engine oil................ 247
FUeLIRG!s © anecsns so answers & v annum © ¥ seems WH avose 239
Leaks... i eee eee eee eee 243
Fragrance... ... ee eee eee eee 92,93
Free text search
Media....... cee eee eee eee ee 227
R&GiOiss = = seus = = saupe & = ems 4 neoRE ee 214
also refer to Intelligent search.......... 201
Freeze protection
Coolant... .. 0. eee eee eee 248
Windshield washer system............. 254
Frequency band..........-..00 eevee ee 212
also refer to Frequency band........... 212
Front center armrest ....... 000. cece ee eee 65
Front collision warning
refer to Audi pre sense front............ 149
Front passenger’s seat adjustment
PRON. « ssweece xo aceane wo axevene ao coenaie w 6 ace 65
Rear... eee eee eee 65
Front wiper blades
ChanGinG’s + x same sy eames ¢ a eae ¢ HER Fe 58
Cleaning « « cvs sv even oe enn oe ence oo 58
FUGls sce ¢ x cage x 2 eee 7 o we Ye eee ee 238
TAGAIEIVES «scones x 5 sures @ 2 sxenene © 8 ommrane oa ot 239
Current consumption................... 16
Fueldisplay sec: = s sees ey seen sy eee ge es 12
Fuel-tank. capacity’: « scsi oo cise a 0 caves « 314
Gasoline
Reducing fuel consumption............ 102
Fueling
Fuel filler door..... 0.0... cece eee eee ee 239
Fuel filler door emergency release....... 241
Fueltankcapacity'. « 5 con es cone a wanna « 314
Functions on demand...............0.4. 194
Functions that require a license.......... 194
also refer to Functions on demand....... 194
G
Garage door opener............--0ee eee 48
GarMeNthOokS scesiiss sv cevevee oo ances o a wees 9 0 2 83
GaSOlING cy « x wares & 2 meee = 2 eee 4 ¢ eee 4 8 238
Additives ...... 0... cece eee eee 239
Gasoline mixture ...............0000ee 238
GAWR
refer to Gross Axle Weight Rating (GAWR) . 314
Gears... eee 97
Glossary of tire and loading terminology... 259
Glove compartment..............000 eee 83
G meter
refer to Sport displays.................. 15
Gross Axle Weight Rating (GAWR)........ 314
Gross Vehicle Weight Rating (GVWR)...... 314
GVWR
refer to Gross Vehicle Weight
Rating (GVWR) « ssope « 2 wecne 2 2 ceuee & 2 ces 314
H
Hanastrees « « asms = eevee § = netR se HOR Se 182
Hatids Free Profiles « 2 swcas x x agus ¢ 2 ems 2 182
Head-up display
AGjUSUING was +» ences 3 ¢ swe yo ees oy eee = 27
Adjusting the brightness................ 55
Operating...............0 0. cece eee 27
Headlight range control................05 51
Headlights
ClOSNiNG’s = = cams ¢ 5 eas 7 o Seas tS ee Ea: 281
Headlight range control................ 51
Washer system... 1.2... 00. e cee ee eee 57
Washer system (filling washer fluid)... . . 254
Head restraints
ACIUSEINGisyes x = sewas 3 2 gas x & eewR = # aR x 67
Removing and installing................ 67
Heated rear window .........000 sees eeeeen 92
Heated steering wheel.................0. 93
319