I'm looking @ the Autolite xp iridium spark plugs, but wanna see what others think, recommend and, use. Thanks.

 

NGK-V-POWER(ZFR5N)

 

Standard Champion copper top - less than $2 ea. and the 4.0l LOVES them !
Autolite is a good second but don't waste your $ on fancy plugs. You will be disappointed in the performance.

 

Use what the factory recommends and nothing else. Newer vehicles have extremely finicky ignition systems. At least once every other week, i get to diagnose a misfire code on a backyard "mechanic"s car or truck that hes "just changed plugs and wires" on.

It may not show immediately, but using gimmicky quadruple hardened double uranium 6 tipped plutonium plugs is going to cost you in the long run.

Gm takes ac delco, ford = motorcraft, chryslers use champion, honda is ngk, so on so forth.

 

 

champion copper ones here. my old plugs (NGK) after 7000 miles went from a .035 gap to a .060 or more on an all the plugs, and one of tghe sleeves even broke and caused what sounded like a rod knock.

 

champion copper core, most likely will have a misfire if you put plat or irdium in there, copper the best conductor of electricity, the only reason y you run plat or iridium is so the car needs "less maintance" and if the plugs are difficult to change (ex. have to remove manifold for the back 3)

 

E3 diamond fires. Best plug I have ever purchased. Just my input.