Spark Plugs

[cabledog25]

Well i dont know if there is another thread about this, but ill be getting ready to do alot of maintenance when i get back so what spark plugs do yall recommend? I dont even know what are any of the good ones or anything havnt never really dealt with them before.

[pjmjr508]

from everything I have heard it is best to stick with the OEM ones.

[lekmedm]

I have been running Autolite iridiums for 82,000 miles in my Hemi with great results. I'm going to be changing them soon.

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[07JeepXK]

I would recommend just staying with the oem. Depending on which motor you have. I have the 4.7 liter and have had about 5 different sets of plugs and am now back to the oem champion plugs.

[cabledog25]

I would recommend just staying with the oem. Depending on which motor you have. I have the 4.7 liter and have had about 5 different sets of plugs and am now back to the oem champion plugs.

I have a 3.7L

[07JeepXK]

Yeah I'd just stay with oem if it was my jeep

[Matt]

I only put OEM plugs I'm my 5.7 and the wife's 3.7.

[cabledog25]

Alright thanks guys, ill probably go with some champions.

[lekmedm]

I just bought a new set of Autolites Iridiums on eBay. 16 plugs for $90. BTW, there's a nice rebate running. Go to the Autolite website to see. I'll get $32 back on the 16 plugs I bought. Sweet!

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[indymtb]

I have the Denso iridium plugs. Spent too much but they have been great plugs. It took 4+ hours to change the 16 plugs (for me - I am a mechanic wannabe) so I thought the iridium might last 50-60K instead of the recommended 30K miles

[lekmedm]

I have the Denso iridium plugs. Spent too much but they have been great plugs. It took 4+ hours to change the 16 plugs (for me - I am a mechanic wannabe) so I thought the iridium might last 50-60K instead of the recommended 30K miles

I went ~90k on my first set of iridiums, and they still looked good when I pulled and replaced them.

[redrockv8]

I went ~90k on my first set of iridiums, and they still looked good when I pulled and replaced them.

I have a 2014 Grand Cherokee with hemi. I was told I have iridiums and that they are standard in all 2014 hemi's. Service dept at dealer checkd my VIN to veryify I had iridiums. He said they are good for 100,000 miles. Prior to 2014 only police package hemi's were equiped whth iridiums.
I already have it in my head that I want a 2020 Grand Cherokee so (I'm old and this will be my last hurrah)I'm sure I'll have the new one before I reach 100,000 miles on this one.
Maybe by 2020 they will wise up and produce another Commander. I'd buy one in a heartbeat.
HT

[The_War_Wagon]

Got a friend (he's from Liberia, and not really up on Jeeps!!!) with an '06 5.7 WK that needs plugs. I'm gonna help him, so any recommendations is welcome!

[paroxysym]

BUMP, are you guys changing your plugs at 30k?

just changed mine at 90k, just rolled 120k

[Matt]

Yeah I change mine every 30k.... I'll be hitting 60k on the odometer in about 2 months

[andyb]

I changed mine at around 90k, and dang were they shot, haha :D I have no idea is any of the previous owners had ever changed the plugs. 30k seems reasonable to me. Heck why not? <$20 for Champion stock replacements.

[The_War_Wagon]

BUMP, are you guys changing your plugs at 30k?

just changed mine at 90k, just rolled 120k

Changed mine @ 60k, because that's when I bought it. ALMOST to 80k now - got a while 'til the next batch.

[lekmedm]

If you are running OEM copper plugs, change every 30k miles. If you run iridiums, you can change every 100k miles!

[The_War_Wagon]

If you are running OEM copper plugs, change every 30k miles. If you run iridiums, you can change every 100k miles!

Well that's what I THOUGHT, but I wasn't sure. I switched to NGK iridiums when I changed mine at 60k. :cool:

[sean112280]

I have the 4.7 with the copper plugs. can somebody help me verify what the gap should be? I am double checking. thanks

[Matt]

Easiest way to double check is look at the placard on the underside of the hood. It'll list the gap and spark plug part number under the engine specs.

[sean112280]

appreciate it Matt. How are you doing?

[Matt]

Doing pretty good man. Keeping busy as usual :)

Fyi I like the new xj!

[sean112280]

Doing pretty good man. Keeping busy as usual :)

Fyi I like the new xj!

Thanks Matt! I'm pretty excited about it. And I think I almost have the wife ready to lift the XK 2-3".

[The_War_Wagon]

Time for new plugs for me - looks like NGK IX Iridium are now the plugs for us.