Since this truck has 16 plugs, what is the best bang for the buck spark plug?

 

Well I did some research which is what I shouldve done before I posted but the stock champions are the best so my only question is, the stock champions are the "SPRE14MCC4", is that equivalent to the champion copper plugs #570 that you can buy at autozone or napa for $1.99ea?

 

I used NGK 5306s in both my Hemis. Catch a sale, and they'll be ~$1.70 each. The MDS has no bearing on plug type. I'm not a fan of Champion plugs.

 

NGK, Champion, Bosch.. all good brands out there just stay away from plugs with electrode materials that are not copper. For some reason above my knowledge level these trucks never seem to run well with platinum or iridium plugs. They come with copper plugs stock which is why the service intervals are so short (36k according to my manual). Stick with a material close to stock and you will be happy..

For my truck the stock were Bosch plugs so I went with those. NGK's are also a good choice. Never heard bad things about champion.

 

The plugs are supposed to be changed every 30K "by the book". I suspect they're OK to 40K or 50K. The plugs on my C were at ~.0050 when I pulled 'em at 49K.

 

What is the gap width supposed to be for the plugs?

 

Just changed mine today, took me about two hours. .45 gap. Champion plugs run about .48 but i left it at that.

 

Actually, .0045

 

Rockauto shows the #570 has the equivalent part #'s 442 & SPRE14MCC4 . $1.74 ea.

 

.045 is the correct gap

The OEM Champion or NGK 5306 are the best. Bosch SUCKS!!