I have a 2011 jk that has 31" tires stock wheels and body. 6 so manual trany. I'm good if I get 17 mpg on the open interstate. If I pull my aluminum bass boat I get 11-12 mpg. And about 12-14 in town wo the boat. What is a good chip to help with gas mileage? I heard bully was but I can't afford...