Disappointed with my mpg after c3000miles, a steady 50 on runs, i added redex advanced fuel system cleaner before a long run.
So, Norwich to Darlington and back. No air con, mainly 50 to 70.
440 miles, average 61.5
Really happy with this.
Martin
Fyi, on previous runs I probably did use ac and perhaps was north of 70 some of the time.