I pulled my Ivan's TRE off to see how much of a diff it makes on my mileage, got one tank out of it last Saturday on a ride and got a few more miles before the light started blinking. I lasted 1 week before I just can't stand the fricken jerk anymore and I'm putting my TRE back in. I don't even care about the mileage anymore, the TRE makes such a difference in rideability it's going back on. How anyone can ride this bike without one ????