Review on NGK 2313 LZTR4AIX-11 Iridium IX Spark Plug, Single Pack by Jack Robi

I bought these plugs for my dad's 2000 Mercury Gran Marquis. it only has 70,000 miles on it and it caught fire with a miss-and-check engine. I changed the spark plugs and reset the engine light. We didn't have any more problems with his car. I haven't checked the fuel economy, but I'm sure the mileage is increasing without any failures or hesitations. I recommend these plugs.