too high fuel consumption Aveo 1.4 Automatic

Hello guys, since last Tuesday, I am proud owner of a Chevy Aveo (thank you for the scrapping premium) and a 1.4 automatic. I’m actually happy with everything, but then the tanking came. The first 392 km I had an average consumption of 9.8 l. Today I was refueling (I drive 100 km to work every day, almost only highway) now the average was 10.3 l and I’m really not raced or similar always nice 120 -140. Now I’m really annoying and wil l make an appointment today in the workshop. In the catalog there was an average consumption of 6.4 l. Really annoying. I write if something new comes up.