NGK platinum iridium is the direct replacement for the plain NGKs.That is what I'll use.All it takes is a little anti seize lube on them to prevent seizing in the head.I'll run them 60k and pull one or two to check wear.If OK I'll run them 90k if I have the truck that long.The difference is in the metal used in the tip.The platinum iridium does not wear as fast so longer run time.

 

Here is the NGK site.www.ngksparkplugs.com Plug number is plzfr5b13e2 with a .044 gap.There is also a tech assistance phone number etc.

 

Well I just got done changing my plugs, I used the same OEM NGK plug. It took about 2 hrs. to do all sixteen. I had to use a swivel to access the back ones, especially behind the brake booster. I understand why the dealerships charge so much now, but IMO still not worth it. The plugs looked good at 30,000 from what I could see, all looked to have consistent burn among them.

FYI... On the passenger side remove the entire airbox, it makes it easier especially getting to the second to the rear cylinder that has the wire harness bundle holder on it. Had to use a 10mm wrench on the coil pack bolt, it was the only thing I could fit on it in the space provided. The rest came off with a 1/4" ratchet & 10mm socket.

 

NGK Technical e/mailed me back.Said that for the moment ony FACTORY'through'the dealer is plugs available.Said that would be changing soon and they will enter the open market.Said that a LONG life plug is not readily available for 09/010s but that will change shortly.Said saw NO REASON that a precious metal plug would be a issue as laser cut is used in 08 back and Platinum's are used in the 6.1 now.

 

Platt plugs will work just fine, 6.1 hemis run platt plugs, platt plugs will last a hell of a lot longer than the copper plugs, how ever, the last Champion plugs I bought in the States siad the plugs were good for two years, unlimted mileage, in my hemi, copper plugs only last for a bought 40,000 Km with my style of driving.

Dodge is saving a lot of coin running 16 chep plugs vers 16 quality plugs, times that by the number of hemis on the road and your caught betwean the greedy hands of dodge and your servicing dealer.

If your going to run a platt plug, I would run a cooler plug than the oem champion copper plug, thier is the worry platt plugs run hotter than a copper plug, but a spark plug is only going to fire as quick as the coil, so copper or platt should work all right.

 

OEM is no longer Champion.Its NGK in 09 and 010 5.7. It was NGK technical I contacted.

 

NGK Technical e/mailed me back again.They say the NEW Platinum plug part number for the 5.7 Hemi is PLZTR5813EG. Said should be out for retail in a month or so.I bet its longer then that but at least its on its way.

 

Thanks for the info. I've got 33k on mine now so I'll hold out for the platinums

 

This is interesting, the real reason platinum's are used is that the manufactures found another item that they dont have to replace (usually) under warranty. They also know that most people dont take car of their cars and run them on regular gas. Hence they are detuned. For performance plat plugs are just OK. The electrodes are small. Switching to a conventional correct heat range copper core plug usually make the throttle response snappier. Especially with injected cars. There is now way just a plug can screw up a warranty unless you put in a plug that is not the same spec and it whacks a piston/. A good set of conventional NGK's will work great. Of course if they are not made to fit, youre out of luck. Plugs should be changed anyway after 30k the engine will just run better. IMO

 

Lots of new vehicles plug change is 100k. I've owned such.Have had plug's come out still OK gap wise and wear was minimal. Going to put platinums in my 09 at plug swap.