Review on 🔌 Autolite Iridium XP XP5363-4PK Spark Plug Set, Pack of 4 by Don Barbee

Ford may say spark plugs last 100,000, but after about 75,000 my gas mileage dropped to 13.5mpg, even with synthetic oil. After installing new candles, consumption in the city is 15.9, on the highway 18-20. The performance has also improved, the fit of the pants is noticeable, at least I can't name any numbers. a little painful to change to 5.0 coyote, but worth the time. I can replace my other cars with a model for them if needed. Time will tell if the update holds up, but for now I'm happy with the results.