New 1996 Jeep, Never Had The Ignition Always Replaced. 261K Miles. 4.0 Liter Engine
yet had the master copy plugs, wires, rotor as well as distributor
https://www.reddit.com/r/Justrolledintotheshop/comments/6r0f7w/when_to_change_plugs_in_a_jeep_40_261k_miles_and/