Fuel consumption much too high Audi80 B4 115Ps Automatic

Hello,I turn to you because nobody can tell me why my Audi 80,115Ps,B4,Automatics,built in 1994 consumes so much fuel. The problem is that I have to refuel more and more often and don’t get that far with the tank filling. Last consumption was about 16liters and came only 340 km far,without reserve,city traffic. Lamdasonde I had a new inside to test,but without success. Spark plugs are new. Gear transmission was set in place 6 months ago. Oil change was 6 months ago. T Emperatursensor was changed 2years ago. Tüv udn Au I got unreserved 3 months ago. The workshops tell me that it is normal that the automatic Audi consumes so much. I also find that it no longer attracts as much as when it comes to driving, but it is hard to get in the way, well my feeling just as a woman. Yesterday someone told me that it could be due to the injection system, I have a digifant machine, engine key letter is ABK. Does anyone know any advice????