Hi, newbie here working on my jeep, it's 2000 XJ, 4.0L, 4x4, 3.5" lift, auto 180,000 miles. I've had it about 3 months and and have gone thru just about all the usual things to create a good baseline, hoses, oils, ignition, fluids, etc.
I had been aggravated with my mileage, the last thing I...