How long are AP764's (plugs) good for..?

[chris kelvin]

Hey guys, i seen on autolite's site that the plugs are warranted/gaurentee for like 3 year..i believe. But in your experiances, do they last a while being that they are single platinum..?

I'm asking cause i put them in my 4.6 thunderbird 5K miles ago (may 05) and recently pulled them, to regap to .053 (.056 was causing misses) which completely cured the problems i was having, i put back the plugs and one wasn't "in" correctly...somehow, and blew out when i started it. The tread's where fine thank god. I got 1 new ap764 (cause i was broke) and put her in, everything nice and tight. So basically i got 7 plugs with 5K and one brand new. I DO NOT want to change plugs again..period. I don't wanna chance messing up that plug hole..cause that's expensive, and i'm trying to get a stang this fall...

Would the plugs last for another 20-30K everyday driving etc.. I'm not concerned about performance drop if the plugs get old. Thanks alot... BTW when i pulled the plugs they where all in good shape..like new, the smaller gap did help in a major way.

 

[Kilgore Trout]

Well, the stock double paltinums in 99+ Mustangs are advertised to last 100,000 miles.

 

[chris kelvin]

Yeah same with mine..the 95 birds came with motorcraft plat's good for 100K. But for some reason, when you look up plugs and stuff they all seem to be 20-30K...?!?!? Even some expensive ones.

 

[Kilgore Trout]

Well, I run copper plugs and accept the fact that I will have to change them about every 2-3 years. I do this because I think copper produces slightly better performance plus I like working on my car.

 

[chris kelvin]

Yeah the copper is best for performance, that's a definite. I remember when i worked at autozone i had all the 50's something muscle car guys ALWAYS wanting them...yet we had like NO motorcraft coppers..

Lol for kicks i would bring out the bosch double platinum with the stupid 4 electrods...they always got a kick out of that.