I would recommend you to read this article as I find it really helpful in improving the mileage of my cars at home.
20 Useful Tips to Improve Your Gas Mileage - Carbibles
Spark plugs are responsible for igniting the fuel in the combustion chamber. If they are not working correctly or are dirty they don't ignite the fuel cleanly and the car can misfire or sputter.
It will be best if you attached some photos for us to see it is still on good condition. Also, you need to specify what tire brand and model is it? There are a lot of tire brands like Nitto, Toyo, and Hankook tires so you need to add more details about what you are selling.
Moving from 17-inches to 18's barely degrades ride quality, and the additional grip is welcome. If you are looking for wheel and tire packages I recommend you check out 4wheelonline.
I feel like I've been productive during the quarantine period and honestly I enjoy staying home. I can go out but not for too long since this global pandemic is not yet over and I am not a fan of wearing face mask for a long period of time.
I am done with adding accessories to this 2005 Rubicon, but I feel like something is still missing. Moving on, I will try to get some support from this community on how to modify the performance and look of this jeep. :???: