Hi, With warmer weather finally coming to Northern CA, my fuel economy has been improving from the 26-27 mpg that I saw this fall and winter. Since its warmed up I have been getting tanks of 28-29 mpg and now my last 2 fillups have been over 30 mpg. This is with my 2000 Jaguar S-Type ( 3L V6, 5 sp AT), that has an EPA rating of 16 city, 24 freeway, 19 combined. Needless to say, I'm pleased.