another vote for the champion truck plugs. not expensive and solid performance. i had ngk's in my saturn and they are quality plugs. for a jeep though, id reccomend the champions.
Delco works fine, although i had NGK's in it...no difference. With my motox bike on the other hand...$11 sparkplug is the way to go NGK pinpoint electrode...the plug that a 2 stroke will never foul no matter what you do
I buy the cheapest plugs I can find for my Jeeps and have never noticed a difference between them and more expensive, fancy plugs -- even in the 4.0 h/o engines.
I just change them every 15-25k miles.
Champion Truck plugs being discontinued? I saw them in the clearance/disco circular at PepBoys and Strauss?????? Might stock up in case the replacements are -=-=-=-=.
I got Bosh Platinum 2's a split plug in my 91 I6, and it runs like a champ. Thing is I also replaced the cap, wires roter, and used di-electric grease on the boots at both ends. I also did an oil change at the same time, as well as changing out the air intake with a cone filter, so it's hard to tell if it's just the plugs, but the truck runs really well now!
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