I have had my current yj for more than 5 years and he is just getting to 150,000 miles. I know the engines last to 300,000+ I been told. I prefer the straight 6 easy to work on - but have not had any engine problems. Just replacing fuel filter in gas tank has become ruteen. I can do it in 45 minutes on off now!! Yeah me!!
Any way to make these filters last longer?