I changed one of my driving habits and noticed a significant increase in my fuel efficiency, like 4-5 mi/gal. I drive at a low rev, that's it. I don't gun it anymore or try to get up to speed fast and i don't drive over 55/60. I keep my RPMs as close to 2000/2500 as i can in the conditions. I started taking the frontage road instead of the highway when i have to travel out of town since I'd rather do 55 than 75/80. #finance source