Do yourself and your car a favor. Use either Autolite double-platinum or the new Motorcraft finewire plug. Skip the conventional single platinum plug as it won't last very long. The finewire is a new style that makes the double platinum electrodes unneeded.
You can look up the correct Motorcraft replacement part at
www.motorcraft.com AutoZone sells them for about $4.60 each.
Changing Mobil 1 at 3K miles is like throwing away 1/2 of every bottle of Jack Daniel's. You're wasting up to at least half of it's useful life (depending on your driving patterns).
Steve
