Keep the shifts under 3k preferably 2500 and you'll notice a increase in fuel econ. Trust me, i gained 4mpg by doing this. I know you feel like you putt (drive like a grandma) on the on ramps going (accelerating) this slow but your pocket book will thank you. Also when i'm trying to save money\fuel I drive 5 under the speed limit. I'm in no hurry to get home or to work. I still get there on time i just leave a bit earlier.