i have a 2003 f150 5.4....im going to change my plugs out and wanted to know whats a good upgrade plug from stock ive heard the autolite double platinum but wanted yalls opinion...thanks for any help...

 

You wont find many autolite fans around here.. The only plug that is an "Upgrade" from stock might be the Denso fine wire iridium plug. Otherwise Motorcrafts are the safe bet..

 

The only upgrade from the standard Motorcraft platinums would be iridiums.

 

well looked at the denso and not really wanting to spend 9 bucks a plug...i will just go with the motorcraft iridiums or has anyone tried the E3 plugs ive seen all the time on tv...

 

Do you believe everything you see on TV?

 

Several have tried the E3 and had to pull them out. Just go with Motorcraft. Your truck will be happy.

 

Agreed, E3 not worth the time to put in or take back out. Stick with the Motorcraft, can't go wrong on that one.

 

Just noticed my signature line is showing LXT and not XLT... Need to fix this one...

 

no i dont but so glad i asked before hand...im going to go with motor craft iridium...should i notice any power or mileage improvement with them?

 

nope

 

well az what do u use? if u dont mind me picking ur mind for a bit

 

there really isnt much in the way of "performance" upgrades over stock. People have reported a VERY SLIGHT increases in MPG using iridium plugs. I'm not sure motorcraft make a iridium plug though. Denso NGK and Champion do For sure..

 

I use the Denso Iridium fine wires and like them. In my case, my city mileage increased to 16 mpg, highway also @ 16 mpg, that stayed the same, but I drive @ 78 mph highway. Not that big of a deal, but mileage did average 14 mpg city before. Try Rock Auto's prices.

Your safe to run Motorcraft, Denso's or NGK's.

 

Well I have an 05 so its completely different, but I use motocraft, not even sure what they are, just the ones ford says to use in these 3 valves

But in my experience I have never seen a noticable difference with changing plugs unless the old ones are worn way out

 

Ive had simular experiance with the Densos..