Platinum's really, really suck

[RAMnCali]

I just finished my 2nd spark plug change, and I'm really disappointed in Napa Auto Parts. I replaced my plugs at 35k with the ones recommended by Napa. I only got 6 cylinders done, and I had back spams for a couple years so I never did replace the last 4 plugs. After joining the forum, I learned more about plugs, and my performance seems to be worse than other Rams in MPG so I replaced with coppers at 55k. Here is a side by side of copper with 55k on the right, and platinum with 20k on the left:



That's one big difference!

 

[S2kiHemi]

Hemi's don't like platinum plugs so that could be the problem.

 

[USMC1188]

Always use the factory Champion Coppers on the Hemis, it's the only thing they like.

That is a HUGE difference between the two.

 

[truckin151]

Yup copper are the way to go. The NGKs are pretty good on N02 from what I've read as well.can't really say how they are on a non nitrous system though as I only run the champion plugs, cheaper and they work well.

 

[smiley]

Champion on older Dodge's and NGK on new ones always copper seems any other "upgrade" screws them up I have no idea why. If you can though NGK plugs are much better than Champion if you have a choice.

 

[MADDOG]

A lot of HEMI owners have found the same thing. The engine just likes copper plugs best.

 

[RAMnCali]

I'm convinced, and glad I decided to swap 'em 15,000 miles early...what a difference

 

[LB3711]

all that black even past the threads tells me that there is another problem. They were loose and there was bypass

 

[KGBIGCOUNTRY]

^Yup

 

[quietpeen]

How much did you pay for those platinum's? I bet that is why napa recommended them.

 

[03MopaRamman]

I learned the same lesson with 2 x colder, wasted 225$ Canadian. I will soon find out how the Crazy Spartan Cam will act with coppers when I drop her in the R/T.

 

[WhiteExpress]

I agree. My Dad's truck was misfiring... I start with the easy things, lets look at the plugs.

Crap-tastic Autolite Double Plats. Who the ____ put those in there?! Some yahoo in Arizona. Didn't clean anything for a crap, dug a grain of sand in nice and deep (felt cross threaded). Idiots.

Threw in some NGK V-powers (basic copper) and the truck runs GREAT!

 

[RAMnCali]

That was the worst looking platinum plug, and the last 1 installed, so it may not have gotten the 2nd check for tightness. Would that usually throw a code or cause other problems? Spark plug boot was in good shape and everything looked ok, anything else to check?