My first car was a 1977 Fiat 124 Spider, and I knew I'd want another Fiat someday. I have had my 2017 Trekking for about 3 weeks now and love it. What is the best driving setting for highway driving? I don't think I'm getting the best gas mileage. I am still learning the various settings/dash display etc. I'd like to see the trip odometer all the time, haven't figured that out yet. Thanks.