Sparks Plugs you use

[ghostsmoke]

I have a 1994 Jeep Wrangler SE (inline six 4 liter engine) want to change spark plugs. Please give me your opinion of the spark plug you use or the plug will recommend. Thanks ghost

 

[Jester32]

Good champion copper plus. Cheap and reliable. Got nothing but problems with anything else. Bosch. Ngk. Etc. we see lots of miss fires etc from jobber platinum plugs.

 

[JohnnyO]

I had Autolite Platinums in it but it was in the shop last week for some issues and among other things my mechanic put in plain ol' Champion copper. Says Jeeps and Mopars run best on them.

 

[duckkillerclyde]

I put autolite in a 4.2. no problems so far. I've only had it a week though. The plugs I took out were autolite also.

 

[JPNinPA]

Older jeeps a good copper plug
High energy ignition like early TJ use single Platinum
Distributorless Ignition System - Double Platinum