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-   -   V8 Spark Plug Maintenance Interval (http://www.jeepgarage.org/f107/v8-spark-plug-maintenance-interval-38004.html)

RCS01 02-27-2012 08:14 AM

V8 Spark Plug Maintenance Interval
 
For my 011' GC, Chrysler recommends changing the spark plugs at 36K mile intervals, while the V6 interval is 100K. Does anyone know why? I am up to almost 100K on the original plugs on my 04' 4.7 V8 with no issues.

amw5 02-27-2012 08:44 AM

Re: V8 Spark Plug Maintenance Interval
 
Your stock plugs are copper and you will definately notice improved performance after replacing them at 100K. Replace them with the stock Champions and you'll be happy you did;)

I'm assuming that the V6 utilizes a longer life plug. Hence, the extended replacement interval.

01grand 02-27-2012 09:09 AM

Re: V8 Spark Plug Maintenance Interval
 
Most newer engines use a platinum plug which will last longer. Also be careful on the 4.7, if they are in there too long you will not have fun trying to get them out without breaking them.

peckmv 02-27-2012 11:50 AM

Re: V8 Spark Plug Maintenance Interval
 
Anyone know why the hemi uses a copper plug and not platinum?

chucksc 02-27-2012 02:48 PM

Re: V8 Spark Plug Maintenance Interval
 
Cost

peckmv 02-28-2012 07:14 AM

Re: V8 Spark Plug Maintenance Interval
 
It seems that it would be much cheaper to have platinum plugs because you have to change the copper plugs three times vs one time with platinum. There must be another reason.:cool:

nek121328 02-28-2012 07:51 AM

Re: V8 Spark Plug Maintenance Interval
 
This topic was covered a month or so ago. Champion makes a 9055 Iridium plug to fit the 2011-12 HEMI. Intial cost is higher than copper, but the plugs have a 7 year, unlimited mile warranty. Change out the copper plugs at 36,000 for improved mileage and performance.

bmrisko 02-28-2012 10:45 AM

Re: V8 Spark Plug Maintenance Interval
 
Quote:

Originally Posted by peckmv (Post 582926)
It seems that it would be much cheaper to have platinum plugs because you have to change the copper plugs three times vs one time with platinum. There must be another reason.:cool:

Manufacturing cost, not ownership cost...

SoCalMoparWK 02-28-2012 11:10 AM

Re: V8 Spark Plug Maintenance Interval
 
the best spark plugs ar E3 Spark Plugs..IMO...I just got sponsored by them and installed my set of E3 and trust me you will notice a difference in milage and performance.

peckmv 02-28-2012 11:21 AM

Re: V8 Spark Plug Maintenance Interval
 
Quote:

Originally Posted by nek121328 (Post 582934)
This topic was covered a month or so ago. Champion makes a 9055 Iridium plug to fit the 2011-12 HEMI. Intial cost is higher than copper, but the plugs have a 7 year, unlimited mile warranty. Change out the copper plugs at 36,000 for improved mileage and performance.

I also went to the NGK site and they spec a platinum plug along with the standard copper plug. The difference in cost is not much, so its a nobrainer. I was just wondering if for some reason the platinum couldn't be used in the hemi. The shocker for me is the cost of the diff fluid. Its like $40+ per quart. I heard its made by Castrol for Mopar. I plan on doing some more research to find a suitable replacement for the Mopar brand.

peckmv 02-28-2012 11:24 AM

Re: V8 Spark Plug Maintenance Interval
 
Quote:

Originally Posted by bmrisko (Post 582988)
Manufacturing cost, not ownership cost...

Wow. A $40+k Jeep and they go the cheap on the spark plugs! :wtf:

swampass2 02-28-2012 12:35 PM

Re: V8 Spark Plug Maintenance Interval
 
Quote:

Originally Posted by peckmv (Post 582999)
I also went to the NGK site and they spec a platinum plug along with the standard copper plug. The difference in cost is not much, so its a nobrainer. I was just wondering if for some reason the platinum couldn't be used in the hemi. The shocker for me is the cost of the diff fluid. Its like $40+ per quart. I heard its made by Castrol for Mopar. I plan on doing some more research to find a suitable replacement for the Mopar brand.

Just read this post yesterday about gear lube. The PDF in the first post is interesting stuff, and if you trust it you don't even want to pay $4/quart for the Mopar fluid...

http://www.jeepgarage.org/f156/interesting-test-on-gear-lube-for-diffs-37172.html


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