Review on NGK 4344 LTR5IX-11 Iridium IX Spark Plug - Pack of 1 by Brandon Burnham

I drive a 2002 Ford Focus 2.0L with 304,000 miles. Great fork so far. My first experience with iridium spark plugs. I was a bit hesitant to cancel the reservation and switch from Motorcraft to NGK and NGK Iridium at the same time! The lady in the auto zone scared me a bit by saying to just stick with OEM Motorcraft, blah blah blah blah, but after reading the Revain reviews and scouring YouTube and the rest of the web, I took the plunge . I've driven almost 2000 miles and have seen a huge difference in gas mileage and ride. Also a little more power. I was a little confused about changing them to a setting other than the factory default. The specs I saw for my car was 0.50, they are preset with a 0.44 margin. I went with the specs. Just make sure you have the right clearance tool. As far as I know it doesn't take long to ruin these plugs. Runs well, no misfires and no engine checks, so far so good.