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| Jim, I want to thank you for a great product that appears to be well engineered and constructed and also does what it is supposed to do. I installed my series 12a double brick unit last week on my 2007 Toyota Fj Cruiser. This vehicle weighs 4500 pounds and is as aerodynamic as a cardboard box. I drive approximately 34 miles to work every day, mostly on Interstate highways. In the past the best mileage I could get was 21.5 mpg by driving like an old lady. This week I have seen my on-highway mileage increase to 28.2 yesterday and 29.9 today. This was driving at a steady 60 mph with no headwind. I use a Scan-gage to compute my mpg. It has been calibrated for speedo error using a good gps so the figures are pretty accurate. These mileage figures were attained under excellent driving conditions with the a/c off but I feel my overall mileage per tank of gasoline will most likely be better than 25 mpg & will certainly be a lot better than what I used to get. Jim L. Florida. |