No aeromods or anything yet, just K&N intake, Magnaflow cat, Flowmaster Delta 40 muffler, 30x9.5/15r Yokohama AT-S tires (6% larger than stock), but most important is the scangauge, as it helps me dial in my foot and keep from wasting fuel in "slightly heavier" acceleration to finding what speeds are the "sweet spots" for my engine that allow it to burn less fuel per mile driven. When I mention that slightly heavier acceleration, if I watch my scangauge, it shows how only a tiny bit more pressure on the throttle from your foot equals 10-20%+ worse fuel economy while accelerating. Also, I keep the throttle position sensor up on the gauge, which helps me keep my foot in check from adding too much throttle over time if I'm getting excited or too relaxed. The long and short of it is that you have to take the time to get to know your vehicle, and where it best performs while giving you good mpg. I know that my jeep is capable of giving 15 mpg the whole time too if I'm not driving it correctly
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