I've been reading here about the one piece Champion spark plug that is supposed to be good replacement in the 5.4 3V. What is the part number for it?

 

Go here and plug in your trucks info:
Champion Automotive Spark Plugs and Glow Plugs - In Stock for Your Tune-Up!

 

Part #7989 Champion. I put a set in about 76,000 miles ago and had one go out this week. It was quiet worn and had a red-gray glaze. All were worn more than the Motorcrafts that I replaced in '08 @ 71,000. But I removed all of them with NO broken plugs. I put in a set of E3.70 plugs. I hope this isn't a mistake but they are a one piece plug also.

 

Be sure to update on how the E3 plugs work for you. I am curious to know. I run them in all my outdoor power equipment but due to past experiences I am paranoid to run anything but OEM plugs in a vehicle.

 

So far the E3's run smooth. I don't have many miles on them but mileage seems a little better. But being the old plugs were worn out any plug should have increased the mileage. I may pull an easily accessible plug in a month or so to look at the tip.

 

Some of the 11-16 trucks were like that also, single platinum plugs up top and fine wire double platinum on the lowers. My 13 had all fine wire plugs when I changed them at 85K.

 

I have run 7989 for years after the first fiasco with mc . It is double platinum and they don't break . Sp 546 mc should be good but why should I go back to mc now . I missed the other bad mc plugs but it was a close call I have a box of sp515s which I would never use . I should give them away .But I would feel bad giving a iffy plug set to someone
E3's are a real gamble .