Yup, the ole' girl finally has around 60k on her clock and I'm feelin' she could be doin' better.
I think its time to consider new plugs, but I would like the hear from those who have already done it, what their experience was, how they like the new plugs and did they decide to change them again soon after.

 

Honestly anyone of those brands would do, like ive said b4 the stock boschs took on a crap on me pretty early, my friends 90's 5spd exploder HATED bouchs as well. I would of went with NGK's if could of afforded them but i got autolites and are happy with them as well. You cant tell any minor improvements unless your looking at your spk maps in real time.

 

i am a rotary guy, so i always lean towards NGK. i have, however, had really good luck in the past with e3's. horsepower tv did a segment on spark plugs and they established that the e3's were the most efficient plugs, IIRC.

 

I've seen that episode several times now, but always have to wonder if that's accurate or if they are "the sponsor" so they have to say good things about them... and they were only showing a new set of plugs over a very short period of time. That worries me.
Also, they used them in American Iron, so they may not be the best for Japanese Aluminum??
I also read a post or two that said that the poster was not too happy w/them. That they fouled, missed and generally went bad quickly in his/their Mazda(s.)

Though I have heard even less about them and they are pricey, I have to wonder about the Pulstars? Are they a power adding gimmick or do they actually work and last?
The capacitor would have to charge in order for the plug to be effective as they claim, then once the discharged how would it charge again before the next firing cycle?
Would the "cap" and additional voltage burn the electrodes out that much quicker?

I need to check my owners manual, but there was a post on Mazda3Club that stated Mazda changed the plugs from 04 to 05 to one heat range hotter (a 5 series to a 6 series.) Now everyone list the 6's as the standard for all years, but they don't work as well in the 04's, what mine is, of course.
I do know that Mazda changed the coils in 05, which may be the reason for the change in heat range.

Opinions and MORE opinions are welcome. Please post up your thoughts, etc....

 

I used e3's for a couple of years in my p5 without any issues, but I also do my plugs at about 15k mile intervals. Now I just use ngk's faithfully. They get me about the same economy as the e3's did, though the e3's did better on city mileage.

 

I am leaning toward the NGK's, but which ones, and it is good to know about the E3's since much of my driving would be considered "city."

Any thoughts on the Pulstars, Wes... or anybody else?

 

Your putting too much thought into it :P Just get some NGK's . The thing with spark plugs it that they are not really going to give you anything unless you start to mess with boost or high hp n/a setups.

 

I agree with Tracker. I put in some NGK Iridium's at 100,000 miles and couldn't really tell any difference, performance-wise, over what was in there before. Seems a spark plug is a spark plug with N/A 3's. My car still runs great and I know I have a highly recommended spark plug that will last!