I'm getting my truck tuned next weekend and I'm wanting to change the spark plugs out and I've been told to get the diamond E3's but I've also been told to just stick with AC Delco w/Chevy and while I'm at it I'm gonna flush the radiator and add some purple ice and flush the tranny and replace the filter just cuz I guess but I was just wanting to know what other people's opinions are.

 

I'm running iridium tipped AC Delco. O'riley's owed me some money

 

ngk tr55's

 

or that

 

ngk tr55

$20 for a set of 8
run them 25-30k and replace

 

Thanks guys

 

Diamond fire plugs are a BS scam

 

Agree...

 

Like as already mentioned stick with either some NGKs or Delco plugs. These companies always coming out with these "miracle" plugs that claim horsepower and mileage gains, seems like every story I've ever read about or heard of guys just have all sorts of misfire issues with these special plugs.

 

Yeah, there's a reason they still use the same basic spark plugs as they always have. Cause they work and that's all you need them to do, if they're effectively burning your fuel then you're good, no room for improvement at that point lol...anyway, ngk makes good plugs and Chevy's seem to like their AC delcos so either would be a good choice. If you get low end plugs expect to be replacing them again sooner rather than later. I've had autolites fail for no reason on me so I only run them if they're really cheap and that's what's available.