Review on 🔥 NGK 3403 G-Power Platinum Alloy Spark Plug TR55GP - Set of 8, Brand New by Terry Keown

I just installed them on a 1997 El Dorado - misfire engine code and previous O2 sensor codes. The power and response is amazing - jumped from 16mpg city to almost 21 - haven't driven it on the highway yet but I'm sure the MPG will be +5. No more rough idle times or computer crashes. Great price - this is my first use of NGK and I'm sold. Was a Bosch user and champion. no longer. Update on previous reviews - they performed better than expected. I've seen my highway mpg go up to 26mpg which is pretty amazing for a 22 year old V8 with 121K on OD. Don't doubt it, they're fine just the way they are. Photos say it all