Zio_Excel

I’m having this issue with my A4 Avant. I’m getting avg 44mpg on a long run from London to Bristol. I get 48mpg from Surrey to Reading sitting at 65 the whole way. I put 50L in the tank and took a drive from London to the Kent coast. When I started I had 470 miles according to the trip computer, despite sitting at 70 with cruise on the whole way down and back I managed 253 miles before it was telling me to refuel. This terrible mileage has been doing my head in! I had an Insignia company car before and could easily get 600 miles out of a tank. In my B8 I can barely get 350 from a full tank. Any suggestions to add on what I can do? edit: Haven’t noticed any change from the emissions software being removed last year