4.6 FLEX FUEL : SPARK PLUGS? what kind. - Ford Forums

mercdriver · 05-02-2009, 07:48

Hello, I wanted to put new plugs in the car. It is a flex fuel and I had found it to use Motorcraft AGSF-22FM1. I dont plan on using the other fuel, just regular fuel. Does it matter if the plugs are plat or iridium/plat plugs. I found two autolite plugs at walmart that were AP104 and APP104. I would think these would work just fine. Any recommendations? Does anyone know of a good crossreference site for spark plugs?
thanks.

Steve83 · 05-03-2009, 12:49

Either use the plugs described on the emissions label under the hood, or call you local dealer for any revised specification. Gas stations all use blended fuels now, so your plan is moot - you'll be burning whatever they sell, which will undoubtedly include some ethanol & methanol. That's what Ford expected when they chose the plugs for your car, so that's what you should install.

**360ci** · 05-03-2009, 18:01

Sticking with OE plugs is a wise decision. I wasn't too enamored with the Motorcraft plugs in my V6 Taurus and had them replaced for some mid range Champions. Now I run NGK and they seem to be performing the best out of all! This V6 isn't an FFV engine either.