The COPPER is in the CORE. Not the electrode. Only plugs causing issues are pulse duration or so I've read. As I mentioned GM has a tech bulletin addressing this. The plugs that came out of my truck were NGK not badge MOPAR. They were COPPER CORE with a NICKEL electrode. The ones I put back in were COPPER CORE with a IRDUIM electrode which is far longer wearing then nickel. I called and talked to several plug manufactures before I bought. The Autolites have a 5 year warranty regardless of mileage. The police package 5.7 and Chrysler hybrids with 5.7 are COPPER CORE,PLATIUMN TIP with a 100,000 mile life expect ency. My 2010 Gran Marquis with 4.6 and my 2008 Corvette with 6.2 both have 100,000 mile spark plugs. Now my 2009 Dodge truck with 5.7 Hemi does also.

 

The stock plugs are NGK not champion and they cost about $4 a piece. I'm at 62K and will be replacing mine again soon. For the $60 in parts I figure I may as well replace them if I have to go through all the trouble of pulling them for inspection.

 

Mopar part number directly from Owners manual RE14MCC4. That is a Chamipon plug #570.
Now, I do know Mopar changed plug brands in late 2008/ealry 2009, so they may have went to NGK at that time.(cost savings likely)

570 RE14MCC4 are $2.09 at AdvanceAuto
NGK 5306 are $2.79 at AdvanceAuto

BOTH plugs are interchangeable.

BTW, do a search for coupon codes for AdvanceAuto. They have great codes when you buy online and pick up in store as compared to buying in store.

 

Do you happen to own a 4th GEN? Because they use NGK and are not the same plugs used in the 2008 and older non mds engines
From the manual -
Hemi - LZFR5C–11 (Gap 0.043 in [1.09 mm])

Spark Plugs – 3.7L Engine ZFR6F-11G (Gap 0.043 in [1.09 mm])
Spark Plugs – 4.7L Engine Upper Bank — FR8TE2 (Gap 0.039 in [.99 mm]) Lower Bank — FR8T1332
(Gap 0.051 in [1.30 mm])

Spark Plugs – 5.7L Engine LZFR5C–11 (Gap 0.043 in [1.09 mm])

 

I have an '08. 2006-2008 have mds and use the 5306's. Infact, all Hemi's 2003-2008 use the same plugs! They aren't mds or non-mds specific.MDS has nothing to do with the plug. The '09+ apparently use one step colder LZFR5C-11 because of slightly different designs to get the added HP over prior years.
Looks like Mopar made the efforts to have exclusive rights to that plug. If you want to pay $2 per plug, you can go to the NGK 4306's(LZTR5A-13) used in the 6.1L's. Not sure what one step colder is in Champion's??

Chrysler uses the same plugs for both cars and trucks. Even the Neon's use the 4306's.

 

Those plugs may now be available through auto part stores. It was taking a while to do so.

 

You can buy them from Jegs, RockAuto or the dealer - maybe some other locations by now. 92174 is the NGK number - they cost about the same (around $4) everywhere I've found them. I could care less if they are $2 or $4 a plug - 30K miles is 1.5 years for me so an extra $32 every year or 2 isn't worth sticking the wrong plugs in the truck.

My personal pref would be to never stick a champion plug in any of my vehicles. Maybe they have been improved over the years, but they used to be the cheapest botom of the barrel plug you could buy.

 

Wrong plugs? huh? Nobody said to use the wrong plugs. Just because Dodge says to use XXX part, doesnt mean you cant use anything else. Guys run Platinum, but the book says coppers! Lots of guys run a diff plug than what the manual states. You seem to be the kinda guy where...If the book doesn't say you can do it, you aint doing it person... My father is that kinda guy. Alot of people are that way too. You end up paying more for no good reason sometimes.. I use the book only as a guide.
Also, as far as Champion goes, all Dodge vehicles came with Champion from the factory. Guys run them all the time no problems. If you had a bad experience years ago....Might be time to let those feelings go...lol

16 plugs is alot to change twice for using incorrect plugs. Not swaying you eitherway. I hjust merely stated what plugs were for what is all. Like I said before, I forget where I post sometimes and 3rd Genners are all talking about the same mods over and over so its a bit repetitious over there.

 

Wrong plugs as in wrong heat range. As for the copper vs platinum, people have had pretty mixed results with the platinums in the 4th Gen Hemi. Some of them cause problems - why I couldn't tell you. Looks like the factory platinums used in some of the police vehicles have become available, but even if they are good for 100K I'd still be pulling them to check gap and make sure that they are not seizing in the aluminum head - and that is the part that is apain in the 4th gen so I personally don't see a benefit.

And as for being a "manual" kind of guy - yes. I've built enough engines myself to realize that if I don't have to screw around trying to find the right heat range on plugs I don't. Dodge is kind enought to tell me what works best with their engine so that's what I'll go with.

 

Darn. The Platinums are COPPER. The Copper is in the CORE. NOT the TIP. The Iridium I used are COPPER. The factory plug the TIP is not copper. Its CHEAP nickel. The CORE is COPPER. two different parts of the spark plug. Thousands upon thousands of vehicles are using 100k plugs and not pulling them to inspect gap and such. They pull them at 100k and replace with no issues.