best spark plugs for f150

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  • severedmikey over a year ago
    im gonna get new spark plugs and it seems kinda important that i get good ones.  its a 4.6 v8.  what does anyone recommend?

  • corey0814 over a year ago
    Edited: 1/13/2009 7:00:40 PM by corey0814

    someone advised me to use the iridium's for my corolla (daily) because they'll up your mpg like crazy & i thought they were full of it, but auto zone owed me $25 in store credit, so i thought "what the hell?"  i used them & honest to god, i got 5-6 mpg difference.  they're about $8 ea, but eventually they'll pay for themselves.  i put a set in all of my vehicles!  motorcraft does make the iridum for fords too...  

  • groundedbigbody over a year ago

    use the motorcraft ones from ford there better than all the aftermarket ones out there

  • bagtodrag over a year ago
    use the factory motorcraft plugs, everything as far as aftermarket plugs and wires are basically junk when it comes to our trucks.

  • 97hrdbdy over a year ago

    no autolite, just motorcraft

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