2019-2025 Audi RS6 4 Door Checking and topping up fluids -> Fuel User Manual
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Checking and topping up fluids -> Fuel for Your Audi RS6 4 Door Fourth Generation (2019-2025)

Checking and topping up fluids  
Information on petrol  
Checking and topping up  
fluids  
The correct fuel grade for your vehicle is listed in-  
side the fuel tank flap.  
Fuel  
The vehicle is equipped with a catalytic converter  
and must only be run on unleaded petrol. Petrol  
must be sulphur-free and must comply with the  
EN 228 fuel quality standard or equivalent. The  
petrol grades have different octane (RON) or An-  
ti-Knock Index (AKI) ratings.  
1)  
Identification of fuels  
In countries where sulphur-free fuel is not availa-  
ble, you may use low-sulphur fuel instead.  
The following headings relate to the sticker on  
the inside of your vehicle's fuel tank flap (exam-  
ple):  
Fig. 119 Fuel tank flap sticker: Identification of fuels (ex-  
amples)  
95 RON/ROZ or min. 91 RON/ROZ  
The correct fuel grade for your vehicle is listed in-  
side the fuel tank flap.  
The use of premium petrol (95 RON / 91 AKI) is  
recommended. If that type of fuel is not availa-  
ble, regular petrol (at least 91 RON / 87 AKI) can  
be used with a slight loss of power.  
The symbols signify different fuels. Depending on  
the fuel, the individual symbols may be found on  
the vehicle’s fuel tank flap. In some countries,  
you will also find the information on the fuel  
pumps. This is intended to help prevent incorrect  
fuel from being used. Only fill the tank with the  
fuel types shown on the vehicle’s fuel tank flap.  
min. 95 RON/ROZ  
Premium petrol (at least 95 RON / 91 AKI) must  
be used.  
If premium petrol is not available, the engine can  
be run on regular petrol with 91 RON / 87 AKI as  
an emergency measure. In this case only use  
moderate engine speeds and a light throttle. Fill  
up with premium or Super Plus petrol as soon as  
possible.  
1 Petrol with ethanol: “E” stands for ethanol.  
The number refers to the proportion of ethanol  
in the petrol. For example, “E5” means that the  
fuel contains a maximum of 5% ethanol.  
2 Petrol with ethanol: “E” stands for ethanol.  
The number refers to the proportion of ethanol  
in the petrol. For example, “E10” means that  
the fuel contains a maximum of 10% ethanol.  
3 Diesel with biodiesel: “B” stands for biodie-  
sel. The number refers to the proportion of bio-  
diesel in the diesel. For example, “B7” means  
that the fuel has a maximum of 7% biodiesel  
content.  
98 RON/ROZ or min. 95 RON/ROZ  
The use of Super Plus petrol (98 RON / 93 AKI) is  
recommended. If that type of fuel is not availa-  
ble, premium petrol (at least 95 RON / 91 AKI)  
can be used with a slight loss of power.  
If premium petrol is not available, the engine can  
be run on regular petrol with 91 RON / 87 AKI as  
an emergency measure. In this case only use  
moderate engine speeds and a light throttle. Fill  
up with premium or Super Plus petrol as soon as  
possible.  
4 Diesel: “XTL” stands for paraffinic diesel.  
1)  
May vary in different countries.  
225  
Checking and topping up fluids  
Information on petrol grade  
Information on diesel  
You can use higher octane fuel than your engine  
requires.  
The correct fuel grade for your vehicle is listed in-  
side the fuel tank flap.  
Octane rating for vehicles with petrol engine  
for Republic of Korea  
The use of sulphur-free diesel complying with  
the EN 590 standard is recommended.  
Vehicles with petrol engine must always be filled  
with high-grade petrol with an octane rating of at  
least 94 RON. If no high-grade petrol is available,  
standard petrol (91 RON / 87 AKI or higher) can  
be used as an emergency measure only. Using  
standard petrol (91 RON / 87 AKI or higher oc-  
tane rating) may reduce the engine performance  
and increase fuel consumption.  
Diesel can thicken at very low temperatures,  
which can result in problems starting the engine  
or prevent the engine from running smoothly.  
For this reason, filling stations in some countries  
offer winter-grade diesel during the cold months  
so that you can continue to operate your vehicle  
reliably. Ask at your filling station whether the  
diesel available there is suitable for the current  
conditions and for the temperatures which could  
potentially occur.  
CAUTION  
Do NOT fuel your vehicle with high-ethanol  
fuel blends (e.g. E30 – E100). This will dam-  
age the fuel system.  
Special regulations for vehicles with diesel  
engine for Republic of Korea  
Do NOT fuel your vehicle with high-metha-  
nol fuel blends (e.g. M15 – M100). Damage  
will occur to the fuel system and the engine.  
Even one tankful of leaded fuel would per-  
manently impair the efficiency of the cata-  
lytic converter.  
To ensure that the vehicle complies with the  
emission standards, additives with the specifica-  
tions stipulated by the manufacturer must be  
used and added.  
CAUTION  
Audi recommends that you use only addi-  
tives approved by Audi. Additives with so-  
called octane boosters or antiknock addi-  
tives can contain metallic additives that  
cause significant damage to the engine and  
the catalytic converter. Do not use such ad-  
ditives.  
Never use FAME fuels (biodiesel), petrol,  
heating oil, thinners or any other fuels or  
additives, as these could cause serious dam-  
age to the fuel system and the engine.  
Never start the engine if you fill up with the  
wrong type of fuel, as this could damage  
the fuel system and the engine. Seek pro-  
fessional assistance.  
Metal-based fuels, which can be identified  
from the marking on the fuel dispenser,  
must not be used. LRP fuel (lead replace-  
ment petrol) also contains high concentra-  
tions of metallic additive. Risk of engine  
damage!  
1)  
Information on paraffinic diesel  
The correct fuel grade for your vehicle is listed in-  
side the fuel tank flap.  
High engine speed and full throttle can  
damage the engine when using petrol with  
an octane rating lower than the correct  
grade for the engine.  
You can use sulphur-free paraffinic diesel that  
complies with the EN 15940 standard if the  
“XTL” symbol is on the sticker inside your vehi-  
cle’s fuel tank flap. You must not use this fuel if  
the symbol is not on the sticker.  
Please also refer to the description of diesel  
ðpage 226.  
1)  
This fuel is available in certain countries only.  
226  
Checking and topping up fluids  
Filling the tank  
Driver messages about the tank system  
The following driver messages may appear, de-  
pending on the equipment installed in your vehi-  
cle:  
Driver messages  
If the indicator lamp lights up and a corre-  
sponding message appears, you should add fuel  
to the vehicle’s tank.  
Fig. 121 Fuel tank flap with tank cap attached  
The fuel tank flap is unlocked/locked automati-  
cally by the central locking system. The fuel tank  
flap is not locked when you lock the vehicle from  
the inside by pressing the central locking switch.  
Tank system malfunction! Please contact  
workshop  
There is a malfunction in the tank system. Drive  
to a qualified workshop without delay and have  
the fault rectified.  
Preparing to fill the fuel tank  
Switch the drive system off.  
Vehicle refuelled. Reset km/miles now?  
Press the left side of the flap to open it  
ðFig. 120.  
Select Yes if you want to reset the trip recorder  
to zero.  
Putting fuel in the fuel tank  
The display of this message depends on the  
amount of fuel in the tank and the amount of  
fuel added.  
Unscrew the tank cap anti-clockwise.  
Hook the cap onto the open flap ðFig. 121.  
Insert the filler nozzle into the fuel filler neck  
as far as the stop.  
Filling the fuel tank  
Start refuelling. The filler nozzle cuts out as  
soon as the fuel tank is full ð  
.
When the fuel filler pump switches itself off,  
wait for 5 seconds before pulling out the filler  
nozzle so that any remaining fuel can flow into  
the tank opening.  
Screw on the tank cap clockwise until it clicks  
audibly.  
Press the left side of the flap to close it (you  
should hear it click into place).  
The correct fuel grade for your vehicle is given on  
a sticker on the inside of the fuel tank flap. Fur-  
ther notes on fuel ðpage 225.  
Fig. 120 Vehicle as seen from the rear right: Opening fuel  
tank flap  
The tank capacity of your vehicle is given in the  
Technical data section ðpage 288. The maxi-  
mum possible amount of fuel that can be added  
depends on the amount remaining in the tank.  
227  

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