[Blue)(Fusion]

I went with Bosch on my first plug change. I never really noticed a problem with them. A year later I swapped them out for Motorcraft plugs and realized that my sloppy idle was a result of the Bosch plugs.

Motorcraft parts were developed by Ford for use in Fords, so they really do literally get you the best bang for your buck.

Don't get me wrong, there's nothing wrong with other brands for some parts, but for stuff like plugs and O2 sensors, stick to Motorcraft.

And I recommend Autolites because Autolite is the manufacturer of the Motorcraft plugs so they are identical in design and quality. I'm sorry I don't have the part numbers on hand, though.

Also don't let them upsell you to the double or quad electrode plugs or Iridium plugs. More than one electrode is useless since electricity travels the path of least resistance, so it only fires from one electrode at a time and both electrodes wear at the same rate, anyway. Iridiums are a harder metal, but will likely not last any longer than plats. Platinums are good for 80-100k or more. Copper are only good for about 20-30k before they start to decrease performance since they have the lowest melting temp of the three metals.