Get the Iridium's if you can swing $70.00 for a set of plugs... Well worth it IMO. I just pulled mine last weekend and they don't look bad at all!

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02 Liberty Limited
Silver Outside & Taupe Inside
Heated Seats, Sunroof & Infinity speakers
USA Spec I-Pod adaptor, Mopar Sub, Garmin GPS
Tow Package, Select-Trac
Rock Rails, Tow Hooks

I can but not sure I want too or can justify it to myself, lol.

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My Rig:
2008 Jeep Wrangler JKU
OME HD lift
35" tires (thus far)
plus a ton of other things. J.E.E.P.

Over the past say 10 years I have had Jeeps, Fords, GMCs etc and have tried those expensive do all, wonderful, newest on the market plugs and none have ever really done any better for me than just the plain old plug like say the Autolites. Plus I change mine out every 25,000/ no more than 30,000 so they work well, period

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MUDD'S MOTORSPORT'S We do IFS lift installs ,
03 OVERLAND EDITION /Kilby-Skidrow-Mopar-4XGuard skids/ 2.5 inch TOTAL CONTROL JBA coilovers -JBA Arms/MOABS-31 FALKEN WILDPEAK AT3W / 4.10's etc, 04 Kilimanjaro Edition loaded, plus 05 KJ limited

Spark plugs. Uhmmmmmm... Coming from a drag racing background and sitting in on many engine dyno sessions over the years I have found you won't pick up but a small amount of power... if at all with a plug change. On our Jeeps you'll find that keeping the plugs gaped properly and the coils up to snuff will return you with good performance.

I just changed my plugs and put the standard NGK plugs back in... ZFR6F (I think). $1.86 ea from the local auto parts store. You'll find that the platinum plug will give you longer life due to the platinum coating, that's about it. One word of caution, if you're checking the gap on platinum coated plugs with a feeler gage, don't scrape off the platinum coating... it can create some headaches.

Clark

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"The difference between stupidity and genius is that genius has its limits"
Albert Einstein

2004 Jeep Liberty Sport
V6, Auto w.O.D., 4x4, 3.73
OME med front & rear, OME struts & shocks
Moab wheel w/Goodyear Silent Armor 245/75R16

Great to know. TY

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My Rig:
2008 Jeep Wrangler JKU
OME HD lift
35" tires (thus far)
plus a ton of other things. J.E.E.P.

Who needs stinkin' spark plugs?! jk

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06 Jeep KJ CRD Sport full Mopar skids, front tow hooks, rear hitch shackle, Magnaflow muffler, Samco Sport CAC hoses, 02 Airbox mod, Unique series 42 steel wheels.

hehe true but the help me with my gas

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My Rig:
2008 Jeep Wrangler JKU
OME HD lift
35" tires (thus far)
plus a ton of other things. J.E.E.P.

So, I picked up some plugs and now I am trying to find out what gap I really need. The sticker on the Jeep says 0.040 the book from Aulotlite said 0.035 What do you guys have yours at? I ended up getting some Autolite Platinums.

I just found another reference that says they should be at 0.045

Should I just leave them at stock and hope for the best? LOL

Just found my service/repair book on it and that says 0.042 LOL. Either way I will make it work D-Day tomorrow morning. Figure safer than when I have a few beers like I am planning tonight. Although few beers plus working on engine = not feeling the flesh being scraped off hands...hmmm

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My Rig:
2008 Jeep Wrangler JKU
OME HD lift
35" tires (thus far)
plus a ton of other things. J.E.E.P.

The sticker in your engine bay is the correct gap #,go with 0.040".You can't use a regular gapper on platninum plugs,need some sort of plastic covered gauge or you will ruin the platninum plugs.

Well I decided to do the spark plug swap tonight. Not too bad. Drivers side super easy, passenger side front easy second a little harder last one...borderline evil stepmother, lol. All got swapped though. I thought I would check to see what the gap is on the old ones...anyoen care to make a guess? I have just under 84,000 miles on her and have never had the plugs swapped.

I will check later Sunday afternoon and see what if any guesses are posted before i post the actuals.

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My Rig:
2008 Jeep Wrangler JKU
OME HD lift
35" tires (thus far)
plus a ton of other things. J.E.E.P.

I will hazard a guess that 2 were at .040, 1 was at .042, 1 was at .045, and the other 2 were at .035.

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Pete
L.O.S.T. #PC050458
'04 Timberland Green Sport w/stuff...
'08 105th Anniversary H-D Dyna Low Rider
OH-58D Kiowa Warrior

HEHE WAY WAY WAY WAY WAY WAY off! Much much larger! I was shocked and wondered how that could be.

I swear no one will believe me. I still have the old plugs and just might try to take a pic of them for proof.

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My Rig:
2008 Jeep Wrangler JKU
OME HD lift
35" tires (thus far)
plus a ton of other things. J.E.E.P.

When I first changed my plugs at 28,000miles all of them were at least at 0.090"+,I was amazed my KJ even ran.NGK plugs are just plain junk !

Yeap, you are pretty much there. The range was 0.078 to 0.10 which shocked the hell out of me. I agree those NGK plugs are crap. Hopefully these Autolites are better. We made a slurpee run and the response is like night and day, lol. Very nice change out and way over due.

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My Rig:
2008 Jeep Wrangler JKU
OME HD lift
35" tires (thus far)
plus a ton of other things. J.E.E.P.