fuel additives AUDI A5 2021 Owners Manual

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.
226
@) 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 >

8W7012721BB
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. 161 Right rear side of the vehicle: opening the fuel
filler door

Fig. 162 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. 161.
> Unscrew the tank cap counterclockwise.
> Place the cap from above on the open fuel filler
door > fig. 162.
> 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. Donot =>
227

8W7012721BB
Index

Exterior MinrorSeecs «= cess oe cure +o coarene © o ove 63
Folding settings........... 0. cece eee ee 35
External voice operation................. 28
F
Factory default settings
Multi Media Interface...............4. 222
Fast route............ 0.00.00. . 0022 191
Favorites... 0... 0... eee eee eee ee 22
BIWetOOth ¢ « sses so eees co eG Hee ee Be 224
Navigation’s. © « cscs. 6 2 sma o 0 omens o 0 woman 192
Telephone ........... 0. e eee eee eee 176
Federal Communications Commission (FCC) . 297
File formats (media drives) .............. 216
Filling
Tank capacities... 0.2.0... eee eee eee 300
For the sake of the environment
Disposing of engine oil................ 235
FUGLING(s = aes s « seme & ¢ seus = 7 ERS & oe 227
LO AKS base ox estzane ew esecire o somneun ss & wrenene we ¥ rane 231
Forward gear
refer to Gears... ... eee eee eee 105
Free text search
Media... ..... 0. eee eee eee 215
RadiO:ss ss ssc « = nes 5 2 ceree Sees ee 204
also refer to Intelligent search.......... 191,
Freeze protection
Coolant... ...... cee eee eee eee 236
Windshield washer system............. 242
Frequency band...............--0000-- 202
also refer to Frequency band........... 202
Fronit‘centerarmrest © esis s caes ae eee sve 72
Front passenger’s seat adjustment
ROAM cesses 6 & sonra 5 & anion & & seRON ow SMO we Be 71
Front wiper blades
Changing............. see eee eee eee 66
Cleaning... .. cece eects 66
Fuel... cece eee eee 226
AddItIVGS « ces z = seus ¢ s een 2 eee se os 227
CUPFENt: CONSUMPTION « esses 6 cee we eee oe 17
Fueldisplay....... 0.0... cece eee eee ee 12
Gasoline : wess + y ees ss ca6s to ews Fe ees 226
Reducing fuel consumption............ 110
Tank
capacity. ........... 0. cee eee eee 300
Fueling
Fuel filler door..... 0.0... cece eee eee ee 227
Fuel filler door emergency release....... 229
Functions on demand.................. 184
Functions that require a license.......... 184
also refer to Functions on demand....... 184
Fuses
ASSIQMIMIOM GE & asvies & weenie © ¥ sursers WF senses v 286
Replacing......... 0c cece cece eee 285
G
Garage door opener............-.000 eee 48
Garment hooks ...... 2... 0c eee eee 92
GasOlime visio: x ceawnwe vo ancane ow ceewe mw aw Oo 226
Additives... 0.0.0... cece cece 227
GaSOline MIXING veux ss meme 2» see so ee 226
GAWR
refer to Gross Axle Weight Rating (GAWR) . 300
GOATS: x = ues © gate « ¢ aes « Rates F RaNEE & 105
Glossary of tire and loading terminology... 247
Glove compartment.............-.000005 92
Valet parking’: s ¢ aes + eons ss wows es eeu 47
G meter
refer to Sport displays.................. 16
Gross Axle Weight Rating (GAWR)........ 300
Gross Vehicle Weight Rating (GVWR)...... 300
GVWR
refer to Gross Vehicle Weight
Rating (GVWR)... 1... . cee eee eee ee 300
H
Handsfree..................000000 00 172
HamdsiPree:Profiles. so sacs + 0 weowee 0 0 ctunene «2 172
Head-up display
Adjusting ..... 6.6.06. eee ee 26
Adjusting the brightness................ 63
Operating’: « s ses « sews + cine oo corer o ¥ ave 26
Headlight range control.................. 58
Headlights’, » segs x + sees se pees se ees ee 58
Cleanings « x visas x 6 aomene eo aevuee wo anarene w oe 268
Headlight range control................ 58
Washersystem:: « « gems « x nama x paemes 2 per 65
Washer system (filling washer fluid) ..... 242
Head restraints « icin s cian s wae a 2 cexsen wv 74
Heated rear Window ¢ sacs iw a eames eee 101
305