2017-2024 Audi S5 4 Door General maintenance -> Petrol User Manual
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General maintenance -> Petrol for Your Audi S5 4 Door Fourth Generation (2017-2024)

document_0900452a81793dcc.book Seite 217 Mittwoch, 21. März 2007 5:42 17  
Fuel and filling the tank  
217  
Fuel and filling the tank  
Petrol  
Filling the tank  
Petrol grade  
Filling the tank  
The correct grade of petrol is listed inside the fuel tank  
flap.  
The vehicle is equipped with a catalytic converter and must only be  
run on unleaded petrol. Unleaded petrol must comply with the  
European EN 228 standard. The petrol grades have different octane  
ratings (RON). If, in exceptional circumstances, the correct octane  
rating is not available, please note the following:  
Fig. 207 Vehicle as  
seen from the rear  
right: Opening fuel  
tank flap  
Your engine normally requires Super Plus unleaded petrol (98 RON)  
according to ⇒ page 281, “Performance, weights and dimensions”.  
Premium unleaded fuel with 95 RON can also be used. This can,  
however, result in a slight loss of power under certain driving condi-  
tions. If premium unleaded petrol is not available, the engine can be  
run on regular unleaded petrol with 91 RON as an emergency  
measure. In this case only use moderate engine speeds and a light  
throttle. Avoid using full throttle. Fill up with premium or Super Plus  
petrol as soon as possible.  
Caution  
Fig. 208 Fuel tank flap  
with tank cap attached  
• Petrol complying with the EN 228 standard can contain small  
quantities of ethanol. However, “bioethanol fuels”, which are  
retailed under various different names such as E50 and E85, and  
which contain a large proportion of ethanol, must not be put into  
the vehicle, as this would damage the fuel system.  
The flap that covers the tank cap is unlocked and locked  
automatically by the central locking.  
• Even one tankful of leaded fuel would permanently impair the  
Unscrewing the tank cap  
efficiency of the catalytic converter.  
– Press the left side of the flap to open it ⇒ fig. 207 -arrow-.  
• 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.  
– Unscrew the tank cap anti-clockwise.  
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