Installed Juice Thursday evening. Been running level 1 till I get my Attitude installed, and letting the Allison get used to it. Drove 850 to Texas over the weekend, average trip speed was 65 MPH. Spent most of the time between 70 and 80. Low, and behold my milage for the trip was 21.7 MPG. Damn thing not only makes it faster, but more efficient.