Best spark plugs to use?

R.Schneck · **Posted:** Tue Jul 22, 2008 7:50 pm

What would be the best plugs to use on the liberty? I dont want to spend 100 bucks on plugs but want a good plus also.

htkrph · **Posted:** Tue Jul 22, 2008 9:45 pm

is there 100$ plugs? are u talking about spark plugs? cause if u are i thought the where cheap.

JJsTJ · **Posted:** Tue Jul 22, 2008 9:51 pm

Tons of threads on this subject and tons of different answers. I Prefer NGK's in Everything since I have always had good results w/ them in Many different vehicles over many years. They are the OEM plugs for your KJ so you really can't go wrong. The v-powers do wear a little faster than the more expensive iridiums, etc but they work and do so well. FWIW, I have the NGK iridiums in my Scion and they look good after 20K so I will be trying them in my KJ next go around.

jsc7002 · **Posted:** Tue Jul 22, 2008 10:12 pm

I cant remember what I used but they were Platinum and I just pick them up at my local auto parts store for about $3 each, and no gapping required

LIV42DY · **Posted:** Tue Jul 22, 2008 10:13 pm

NGK, Bosh, Champions, any other brand or configuration of the electrode is a waste of money unless you drive a High performace vehicle.your plugs should be changed every 30 t0 50,000 miles anyway. Toyota is the only one with iridium plugs ive seen go to about 90,000.

R.Schneck · **Posted:** Tue Jul 22, 2008 11:04 pm

that was me trying to say i dont need expensive plugs

Jeepjeepster · **Posted:** Tue Jul 22, 2008 11:12 pm

Auto light double platinums for me.

sleeve84028 · **Posted:** Wed Jul 23, 2008 7:51 am

Iridium from NKG in the KJ.

Should run around $60.00 for all 6 plugs.

(make sure you get a plastic gapper and don't use metal with the iridium's)

Joe C Renegade · **Posted:** Fri Jul 25, 2008 11:49 am

I went with autolite double-plantinum and haven't been disappointed.

jeepmedic · **Posted:** Fri Jul 25, 2008 2:41 pm

I did autolite platinums. $2.89 a piece @ Advanced Auto. They seem to work fine..

InCommando · **Posted:** Fri Jul 25, 2008 4:26 pm

Jeepjeepster wrote:

Auto light double platinums for me.

Watch them! I love Autolite & have used their products exclusivly for decades, but the correct part # for the KJ does not have the correct gap! I tried two sets, both of which were wrong. And re-gapping platinum plugs without the right tool usually means you no longer have a platinum plug.

Jeepjeepster · **Posted:** Fri Jul 25, 2008 5:39 pm

I checked them and they were ok. Some needed a slight tap to make the gap smaller but for the most part they were ok.

InCommando · **Posted:** Fri Jul 25, 2008 7:59 pm

I had to close the gap on all of them. I took the first set back because I thought that they might be the wrong ones. But I swear that the old butt-dyno showed a bit more livliness in the pig after I did them.

JJsTJ · **Posted:** Fri Jul 25, 2008 9:04 pm

InCommando wrote:

I had to close the gap on all of them. I took the first set back because I thought that they might be the wrong ones. But I swear that the old butt-dyno showed a bit more livliness in the pig after I did them.

I have gotten the same result after every plug change in the KJ w. the NGK v-powers. I also see a nice little MPG improvement that tapers off over time.

iambob · **Posted:** Sat Jul 26, 2008 11:34 am

I went to Advance & picked up Autolite Double Platinum APP 3923. Maybe $4.00 ea.

offroadohio · **Posted:** Sat Jul 26, 2008 5:51 pm

InCommando wrote:

Jeepjeepster wrote:

Auto light double platinums for me.

Watch them! I love Autolite & have used their products exclusivly for decades, but the correct part # for the KJ does not have the correct gap! I tried two sets, both of which were wrong. And re-gapping platinum plugs without the right tool usually means you no longer have a platinum plug.

Ditto. Gappng platinums with an off the shelf gappers is a no no

Joe Jeeper · **Posted:** Sat Jul 26, 2008 6:13 pm

I had Bosch Platinums in the last 30K and now put in Bosch Platinum 2, think I lost about 2-3 mpg. Also put a K&N drop in air filter. Rig is peppy but fuel efficiency is at it's worst. :oops: