As was already mentioned. Coppers have a hotter spark. Autolite's are $1.39 per plug. Its pretty simple to change your own spark plugs and it only cost about $13 every 30,000 miles. Let us know if you have any more questions.mr-mike said:what do you guys think are better in high milage 4.6 regular or platium , years back when they first came out they fouled very easy & didnt give the hot spark of the regular plugs .........................
Kilgore Trout said:Do not use any other brand of plug than Motorcraft.
Kilgore Trout said:.054 if you are mostly stock
Kilgore Trout said:If you are willing to change your plugs every two years then use copper, it has a hotter spark. Use Motorcraft AGSF-32C.
If you want to change them every 60-100k use platinum. Use Motorcraft AGSF-32PP.
There are a lot of tips/tricks to changing plugs, do a search to find them.
Do not use any other brand of plug than Motorcraft.
Kilgore Trout said:So the laws of physics only apply to non-pi? Copper is copper regardless of what engine it is in.
You want to run the widest gap possible before you have issues, if yours likes .051 the best, then that's what I'd stick with.Yellow2002GT said:I have played around with my gap several times.....the reason I asked is because I run platinum plugs and tried gapping from .50 to .60 and My car produced the most power and TQ at around .51. The car has all the bolt on's and then some.....plus the idle was much smoother. My buddies car we set at .55 and his was pretty much stock and it ran better with a slightly bigger gap.... Just wondering why?
"ED"
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