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Discussion Starter #1 (Edited)
I’m not a spark plugologist but these thing don’t seem to be aligned. Does that matter?

Also the plug I pulled out isn’t the same plug I’m putting in.






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I was buying oem type plugs online tonight from here:

Search Results | Mopar Parts Counter

and noticed there was a "China" option which has been discontinued at some point, on that website. The other option looked to be a routine part which is $11. Makes me wonder about all the low cost plugs people are finding on Banazon, FascistBook, etc.
 

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It’s a lot of work to change plugs so I would go with the proper factory original plugs. Purchased from the dealer or an official Mopar site.


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I threw an upgraded set of plugs in my old XJ when it was due for its first set- pre-gapped Bosch Iridium plugs. They were costly compared to the OEM Champions, had a bit of sticker shock at the parts counter. I pulled them 60,000 km later to see f they needed replacement during routine maintenance, and the gaps were the same, the plugs were clean, and the electrodes still looked perfect. I threw them back in and drove on.

I suppose if you want to lengthen the interval for changing the plugs on a JK (which doesn't have the plugs in quite as accessible a spot), it wouldn't hurt to go with a premium alternative over OEM.
 

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You can see the cross-reference from the Mopar SP149125AE part number to Champion here:

 
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Discussion Starter #6
You can see the cross-reference from the Mopar SP149125AE part number to Champion here:

Thanks!! Guess they’re the same.


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Discussion Starter #7
It’s a lot of work to change plugs so I would go with the proper factory original plugs. Purchased from the dealer or an official Mopar site.


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Those are Mopar from the dealer 16 each.


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Discussion Starter #8
I threw an upgraded set of plugs in my old XJ when it was due for its first set- pre-gapped Bosch Iridium plugs. They were costly compared to the OEM Champions, had a bit of sticker shock at the parts counter. I pulled them 60,000 km later to see f they needed replacement during routine maintenance, and the gaps were the same, the plugs were clean, and the electrodes still looked perfect. I threw them back in and drove on.

I suppose if you want to lengthen the interval for changing the plugs on a JK (which doesn't have the plugs in quite as accessible a spot), it wouldn't hurt to go with a premium alternative over OEM.
Those were Mopar at 16 a peice. If your saying Bosch is costly, I’m afraid to ask.

What’s funny is I asked the parts guy what the difference between mopar and champion and he said, “I wouldn’t put Champion in my lawnmower”.

I’m at 80K and my plugs are burnt. I don’t think 100k is an accurate interval.


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Those were Mopar at 16 a peice. If your saying Bosch is costly, I’m afraid to ask.

What’s funny is I asked the parts guy what the difference between mopar and champion and he said, “I wouldn’t put Champion in my lawnmower”.

I’m at 80K and my plugs are burnt. I don’t think 100k is an accurate interval.


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But doesn’t Champion make the Mopar plug? 🤨
 

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Discussion Starter #11



This is at 86k. I’m not sure if you can see but that top peice is less than half thickness.
 

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Those were Mopar at 16 a peice. If your saying Bosch is costly, I’m afraid to ask.

What’s funny is I asked the parts guy what the difference between mopar and champion and he said, “I wouldn’t put Champion in my lawnmower”.

I’m at 80K and my plugs are burnt. I don’t think 100k is an accurate interval.


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What a dick. Champion makes the best lawnmower spark plugs. I suppose one can have a certain amount of success with Champion plugs or else they wouldn't still be in business, but my experience does not bear this out. In carburetted engines AC or Autolite last longer and are far less likely to foul. Edelbrock had a recommendation for Champion with its heads (big block Chevy, 11.5:1, twin Dominators) and they were awful. For computer engines I have never had a failure or poor life from NGK.
 

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What's amazing is I just replaced the originals in my 11 GC at 163k (not my fault, just bought it from my brother in law) and they looked almost identical to the ones above with half the miles.

I paid $14 each for them from my local Chrysler dealer with my discount.
 

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I have always used NGK plugs in all my vehicles.
 
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Those were Mopar at 16 a peice. If your saying Bosch is costly, I’m afraid to ask.

What’s funny is I asked the parts guy what the difference between mopar and champion and he said, “I wouldn’t put Champion in my lawnmower”.

I’m at 80K and my plugs are burnt. I don’t think 100k is an accurate interval.


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Keep in mind that the parts guy works a low paying parts counter job. That is probably because he is not highly qualified at other things. If he were a highly skilled and qualified mechanic, he would probably be out in the shop repairing vehicles.
 

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If you all have an Advanced Auto Parts store nearby, they sell the correct Campion Plugs for $8.49. You can buy them on-line from them too.

advanced plugs.JPG
 

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But the OEMs (for at least the older JK's, like my '12) are not iridium, right? I'd like to go with iridium, but with the Lifetime warranty, I need to stick with OEM
 

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But the OEMs (for at least the older JK's, like my '12) are not iridium, right? I'd like to go with iridium, but with the Lifetime warranty, I need to stick with OEM
In my 2013 JKU, the plugs are iridium. When I changed the factory plugs, the factory plugs that I removed were the same iridium model that Champion said my Jeep required. I just looked on the Champion web site and your 2012 takes the same iridium plugs as the 2013.
4476077
 

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As already mentioned, this is not a easy replacement. So just purchase them from your Jeep Dealer. Make sure that the gap is correct.
 

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Since it is such a hassle to change them, I would stay with a premium plug for sure. It looks like the OEM is a Champion 9407 (Mopar SP149125AE) and I would use those or an NGK 9723 Laser. Both are rated for 80-100k miles. Some Iridiums are only rated for 60k miles... I think this is an important spec to look for.
 
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