Has anyone compared your mileage before and after a leveling kit install? I'm deep in the mpg vs ground clearance conundrum. Expecting a mpg or two worse on the highway if I pull the air dam and level it. Am I far off? I realize bigger tires will get me more clearance but I'm trying to keep it to apples vs apples. I drive a fair bit on road but need to get into the bush too. So I'm thinking about a set of off road wheels and minor mods that won't hurt mpg too much to run them, then switch back to street tires if I won't be off road for a while.