Owner reviews for spark plug

I always stick with Motorcraft double platinum, or Autolites if they aren't available. No reason to get fancy with sparkplugs.

I installed 2 remaining NGK that I had into cylinders 2, 4. Vehicle is running like new right now.

I had 2 spare, new spark plugs and these got rid of the misfires in cyls 2 and 4.

I ***always*** use NGK spark plugs after I tried a set of Champion plugs in my old GT380, and two of them failed after 1,500 miles. NGKs have never let me down in 35+ years of riding.

Just use NGK and put them in dry, never had a problem.

Checked spark plugs. The plug is an NGK BP6ES for those that might want to know. This is #4 plug, other 3 in similar condition. Would seem to indicate over fueling, or misfire condition across all 4 cylinders...

Yup, these are great. Just be sure you gap them to APR's recommended gap of 0.024" ±0.002" or 0.6mm ±0.05mm. If you want 1 step colder plugs, not needed on your setup, but if you do for the future in Stage 2+. For 10$ more than the OEM NGK you can get the BERU.

These are Autolite plugs, not Motorcraft. Which means the plugs in this vehicle have been changed before, that probably has a little to do with why it was easier than usual to get these out. By the looks of the plugs and the lack of carbon buildup and corrosion (the two factors that cause these plugs to size the most) I'd say they weren't in there for a very long time either. Going by my experience with Autolite plugs in Fords (very little experience as I work on Euros mostly) if they don't start misfiring right away it's usually within a couple of months.

Champion plugs are barely adequate for a lawnmower...

I initially got the P0101 code and did the obvious - replaced the MAF sensor. No change, same codes. Goodbye $100.