Genuine SP580 Iridium Spark Plugs Review

I ordered 6 for 3.5l eco-boost for Ford F150 2015. All the candles were with the same gap 0.032" +/-. Replacing the spark plugs fixed engine misfire issues and increased mileage from 15.7mpg to 17.2mpg city.

Over 102,000 miles on my 2015 F-150. These plugs came with a 0.030 gap and they work great! I had to replace them a few years ago, the old spark plugs were from the factory. Check the game, read how to replace them, drive slowly so you don't damage the plastic junk on the engine, and you'll be fine! Have fun

Genuine Motorcraft Spark Plugs at half the retail price. My 2014 F150 3.5 Ecoboost has done 60,000 miles with the original spark plugs and cold starts were slower and harsher. These forced induction engines place heavy demands on spark plugs and after some research they should be replaced about every 20,000 miles as a measure of good maintenance. .028 clearance when tuned to most tuning company recommendations, .030-.036 headroom to Ford factory specs. I used a wire loop spark plug tool to test