Okay so I love my jeep. Hands down best car I have ever owned or worked on but gas is starting to get me. I am wondering what kind of set up would be good for this car to have a max range of at least 300- 500 miles. I like to travel. It is a straight 6cyl 4.0 litre manual transmission 2wd(might consider just buying a 4wd to convert) for now and the curb weight right under 3000 pounds or 1360ish kilograms for everyone else.