Premium fuel. 91 or higher. i just purchased a 2004 Audi A4 and the previuos owner had run regular. The engine was a little sluggish. i started running high test and within a month I felt a notasable improvement. aso ran a can of techron through it.
good luch and always use a the least mid grade if yu want the best performance and engine life.
The 2004 Audi A6 runs on premium unleaded (required).
The 2004 Audi TT runs on premium unleaded (required).
The 2004 Audi A8 runs on premium unleaded (required).
The 2004 Audi S4 runs on premium unleaded (required).
The 2004 Audi A4 runs on premium unleaded (required).
Mounted on top and inside the fuel tank.
premium fuel should say on the inside of the fuel door
90 litres
is your a4 diesel ?
Any grade is fine. It doesn't require premium or mid grade.
87 or higher, enjoy!
It is in the middle of the engine but at the bottom. Its really hard to get to, looks like a can of beans