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Old 10-19-2011, 12:11 PM   #16
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Location: Front Royal, VA
What I Drive: 2012 Focus Titanium, Candy Red

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They are special plugs. They have a very long threaded area. They are also Iridium plugs. Iridium barely wears at all. Unless you develope a misfire due to a bad plug or coil, 100,000 mile replacement might be overkill. I like the Autolite XP plugs. I also use only Amsoil in my cars, and they do not list a filter for that car yet, but looking at 2011 I found the correct filter. I would stay with the factory plugs till the aftermarket releases the correct plugs. I do NOT recomment the Bosch +4 plugs though. I have seen too many problems with them in various cars. So you all know, I am an ASE Master Tech.
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