Just like 95ram, I use E3's and I DEFINITELY felt a difference!!! At my next tune up, I'm just gonna clean them with a spark plug cleaner and pop them back in.

 

I just put the factory AC Delcos in my S-10. What a difference that made over the Autolites I had in there!!! Not very cheap @ $6.79 a plug, but worth it!

 

autolite 3923

it seems to idle smoother than it did before with the Champions it had in it and those only had about 40,000 on them (when i pulled them, they were barely worn, the insulator was slightly brown on all of them, just like they should have been)

 

Autolite 3923.

 

Now I have factory Champion RC12LC4 plugs in Purpl. Much better than the 3923s that I had although I still ping on 93 octane. Need to get that plenum fixed.

 

So is it true that the platnum plugs are worse for these trucks? From what Ive heard the coppers are better? Seems kinda backwards to me.

 

What I've heard is that Platinum spark plugs are a gimmick, like Royal Purple oil. Just a bunch of crap. I use regular copper cores and they work great for me.

 

One thing is that these motors were designed around copper, resistive types of plugs. Every time they come out with a new metallurgy, electrode resistance, or insulator, it always affects something and, in some cases, it causes the engine to run worse.

There's some articles that explain the issues with certain materials. I can't recall or find the link but, I will try to find it and post it here. There's a lot of technical articles on this subject.

I know first hand that when I ran Bosch Platinums in my truck, I had issues with them that I did not when running NGKs or Autolites. I went through two sets of those Bosch plugs before someone told me they were junk and not to use those in my truck. That was the first time I had heard that. I thought hey, plugs are plugs. It's got better metal, it conducts better, it's got four points of contact for spark vs. one so, hey, it must be better- wrong. It was the worst plug that I ran in my Dodge.

At current, I run Pulstars. I have gone back and forth with NGKs and Pulstars and so far, I like how the Pulstars feel over the NGK. I get a much smoother idle as well as better feel on the throttle.

 

Has anyone tried Autolight Platnums. They are $1 more than the coppers and if they will work then itll be worth it.

 

One of the issues with running platinum electrodes is that they run hotter than a conventional Cu electrode. This results in premature detonation and misfires. The issue with Bosch platinum +4 plugs is the gap is not adjustable. While some report them fine for a few thousand miles, they break down and start to cause rough idle conditions. This is what I had found when running two sets of those. They didn't work very well in th long run. I had a friend who ran them in his Jeep only to report the electrodes had gotten so hot that they melted / deformed under high heat conditions. He went back to Cu as well.

The only reason they went to platinum was because of it's outstanding resistance to electrode wear. Cu vaporizes faster than Platinum but, there's a trade off in heat dissipation and, depending whether or not it's solid or just welded platinum, the performance will suffer as a result in certain applications such as towing, hi loading conditions and freeway driving primarily.