Spark Plug Recomendations
 

Time for new plugs. 2005 4.0, anyone have any suggestions? I'm not opposed to spending a little more for something that will offer improvments with mileage and power.... Thanks

Re: Spark Plug Recomendations
 

Spark plugs will not improve mileage or power. Go with Motorcraft or Autolites. Any other brand may not work properly. Especially Bosch.

Re: Spark Plug Recomendations
 

Go with the cheaper plugs like Autolites, Motorcrafts or NGK. And I believe that platnums are a waste of money. Just go with the cheapest one from a bran above.

Re: Spark Plug Recomendations
 

yeah the only reason to go with platnum or iradium is if your gonna build the motor, the iradium and platnum should last a bit longer than the copper ones tho. i bought platnum ones only cause i plan on getting the screamin demon coil pack and high end wires so it might help a bit in that case...

Re: Spark Plug Recomendations
 

Our motors come from factory with platinums.

Re: Spark Plug Recomendations
 

thanks for the input guys

Re: Spark Plug Recomendations
 

What's wrong with Bosch? I got the Bosch Platium Iridium fusion plugs when I changed mine and I haven't had a problem. I got them over oem because I figured for the $6 difference it was worth it not having to space them. Is there a problem these cause that I should be on the lookout for?

Re: Spark Plug Recomendations
 

Yes. When they stop working and your motor starts misfiring, you will understand. No explanation why. Ford motors hate them.

Re: Spark Plug Recomendations
 

X2 i tried Bosch once and never will again, truck never ran right with those plugs. stick with what the truck was built with, motorcraft.

Re: Spark Plug Recomendations
 

Not all, my '09 4.0L came from Twin Cities with Motorcraft coppers in it.