Any difference in Motorcraft SP498 and Autolite AP5143 spark plugs?

Discussion in '2005 - 2014 Specific V6 Tech' started by bighank, Nov 29, 2012.


  1. bighank

    bighank New Member

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    See that the 4.0 V6 calls for Platinium Motorcraft SP498 (AGSF24FM) spark plugs. Motorcraft plugs are made by Autolite. Autolite platinium plug AP5143 appears to be identical but is about $1 cheaper per plug.
    Does anyone know if these 2 plugs are identical?
    Looked around for compatibility and substitution guides but haven't found the specs on these plugs.
  2. bighank

    bighank New Member

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    Looked at both plugs. Construction looks identical. Autolites are BLACK while Motorcraft look like shiny nickel or maybe platinum. Both are supposedly platinum.
    Will spend the extra $1 per plug to get the ones which look like platinum.

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