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https://www.crownvic.net/ubbthreads/showflat.php?Cat=&Board=UBB23&Number=736024&page=&view=&sb=5&o=&fpart=1&vc=1

anti-seize has been discussed here numerous times. don't use it.

if you do not trust our site, do a search on the net. 4.6/5.4l pjug blow out is quite common. the 3 reasons it happens i posted above.

sorry if my post seems crude, but i had a plug blow out(it sux!)... no fault of mine though. it was an error by the previous owner of my car.

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Also,why would somebody want to install a sparkplug that has a higher electrical resistance than Copper in their car?

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My copper AWSFA-12C plugs were wearing out at only 12k miles. The side of the electrode was wearing out where the spark was jumping to the ground electrode. That effectively increases the gap, as that is the distance the spark is jumping. I estimate that in a total of 20k miles, I'd have to regap or replace those plugs. It wasn't wearing down on the flat top but rather on the side.

Platinum was used to prolong the lifespan of the plug, as it is a more durable material than copper (supposedly). However if you look at the AWSF-32P plug, there's a "slug" of Pt on the top of a copper electrode. The current is going to flow wherever there is lower resistance. If the Pt slug builds up too much resistance it is going to find its way to the copper electrode and start wearing it out.

Iridium, from what I've read, is a much more durable material than Pt. In fact, I don't even think Ir plugs are made the same way. The electrode is needle thin and yet, Ford uses it in their production supercharged vehicles. Something must be good about them.

I am now using AGSF-12FM1 plugs that appear to be the same construction as Denso Iridium plugs.
The difference in electrical resistance between the copper, platinum coated, and iridium electrodes is going to be insignificant in this application. That extra "spark" you may get from using a copper (heck, why not use silver - oh wait, it's not going to last as long nor is it cheap) isn't going to yield a noticeable difference in horsepower/torque on the dyno unless you're running a serious application.

The only anti-sieze I use is the Permatex stuff that smells like propane.

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If you're driving your car in a performance manner,then you need to change the plugs at 10-15K miles anyway.
I had a set of those AGSF12-FM1's that you're raving about.
I installed them in my wife's '98 F150.
After 22K miles...they were trash.Only reason I installed them was for the "longer life" because plug changes on the truck are more difficult than on the car.
I'll never use that crap again.I installed copper AGSF12C plugs,and haven't looked back.
I use the same plug in both vehicles now,and even if I change them out every 10K miles-I'm still money ahead compared to installing a set of (insert bling word here)ium spark plugs.
JL

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In response to Johnny-Langton's concerns... I installed the Iridiums as the electrical resistance is almost identical to copper, they are even harder than double platinums so they will last longer, and I really didn't feel like having to do this again any time soon.

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Instead of blowing out the wells, I took Tony_the_Brit's tip in another direction and taped a hose into my vaccuum hose and sucked the garbage out.

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I hope you mean your vacuum CLEANER, and not a vacuum hose from the motor...

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You'd better do some checking...because you have incorrect information.
Copper has 6x the conductivity of platinum,and it's close to 3x the conductivity of Iridium.

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Johnny-Langton, you and Metroplex were correct, my information on the electrial resistance was inaccurate.
My appologies for any indigation. However I still feel it was a worthy purchase.
These plugs are a relativly new technology for street engines, and I would like to see for myself if they are going to outlast the platinums.
I can tell you that since I installed them my engine has been running much smoother at all speeds and it feels great.