I Have this Jeep TJ, 98 Hardtop and I am thinking of installing accessories like light bars, chrome bumpers whatever. Im really concerned about installing a light bar though. The jeep is hard enough on gas as it is, and a light bar would give it more drag. I think i get an average 17 mpg. I go 30 miles from home to town and back, and occasionally drive off road. If i installed a light bar on the top of the windshield with maybe 4-5 4" round lights how much gas mileage would I lose exactly? If the drag is not too bad than it would be ok, but if i loss 3-4 mpg I would probably not bother.