I PURCHASED A 2013 FORD CMAX ON APRIL 30,2013. I WAS ESTATIC WITH THE MPG I WAS GETTING. I DROVE IT AROUNT TOWN FOR A FEW DAYS. THEN I MADE THE LONG TREK BACK FROM ARIZONA TO ILLINOIS, MY MPG KEPT INPROVING. WHRN I ARRIVED HOME MY LIFETIME AVERAGE WAS 39.6 AFTER 2300 MILES. MY MILEAGE DROPPED TO 39.5 AFTER SEVERAL MONTHS IN ILLINOIS I WAS STILL VERY SATISFIED SINCE MOST OM MY LOCAL TRAVEL AVERAGES LESS TNAN 5 MILES ONE WAY. ON AUGUST 16, AT 5284 MILES, I TOOK THE CMAX TO THE LOCAL DEALER AND HAD THE TIRES ROTATED AND 13B07 INSTALLED. I BEGAN CHECKING MPG AT THE END OF SHORT TRIPS, TO MY AMAZEMENT IN STEAD OF BEING 33-36 MPG THWY WERE BELOW 30 MPG. MY LIFETIME AVERAGE AT 5485 MY LIFETIME AVERAGE IS 39.2 MPG. I TOOK THE CAR BACK TO THE DEALER AND ASKED 13B07 BE REMOVED AND THE PREVIOUS PROGRAM PTCM BE RESTORED, THEY REPLIED THAT THEY COULDN'T RESTORE THE PREVIOUS PROGRAM BECAUSE THE SYSTEM WOULDN'T ALLOW A BACK LEVEL PROGRAM TO BE INSTALLED. I CALLED FORDS CUSTOMER RESPONCE, AND WAS TOLD THAT 13B07 WAS INSTALLED AND I SHOULD TRACK MY MILEAGE FOR 30 DAYS. I HAVE READ COMMENTS FROM OTHER WEBSITE MEMBERS SAYING THAT 13B07 DIDN'T WORK FOR THEM THE FIRST INSTALL AND THEY TOOK IT BACK TO THE DEALER A SECOND TIME FOR 13B07 INSTALL. DOES ANYONE ELSE A SIMILAR EXPERIENCE AS ME OR AM I UNIQUE. ANTHONYSCOTT