In my vehicle, 1st and 2nd gear (automatic) are extremely sensitive to increase and decrease in throttle at slow speeds (0-20mph). If you let off the throttle completely in those gears you can feel it in the seat of your pants so to speak. My question is, is letting off the throttle in these gears very good for mpg, good, or bad if I know I will have to increase speeds in the near future? A good example would be something like when you can see a traffic light or stop sign in the distance. If I let go completely it slows down pretty fast, and even faster in 1st and 2nd gear. 2008 Jeep Liberty, 4 speed automatic, and 3.7L engine.