2009 5.4L Replacement Spark Plugs
 

What plugs other than Motorcraft & Champion are folks using?

I was looking at NGK, Bosch, or Accell.

all I`ve ever read is how oe spark plugs are what to use.....but I have no real insight :D just my way of self indulgently bumping your thread:-X24

I may be crazy , but I think the Motorcraft plugs for your engine are made by NGK . NGK actually makes plugs for many OEM brands . GM and others have used them for Many years ....

Autolite is currently offering a pretty decent rebate program with their upper-end plugs. I believe it's $2.50 for their finewire iridium plugs.

Autolite Special Offers

I'll be putting a set in my Lincoln in the next month or two.