This problem has been baffling me for awhile, I have been getting what I feel to be very poor gas mileage from my explorer. The average approx mileage I am receiving is roughly 10 miles to the gallon. In the last 8 months I have had a tune-up, fuel pump replaced ( it failed on me), EGR valve replaced ( it too failed ), it has been looked at by Ford and they say it should be givng me excellent mileage ( I go roughly 300 kms on 60L of gas). I have noticed that my trans is takin time to engage in to reverse or drive ( round 5-6 secs ) and it was down in fluid roughly a month ago. Could my trans, if it is going, give me poor mileage?