(ef1h10)PlasmaCore Spark Plug

Just bought a F150 Ecoboost with 150,000 miles on it. Did major service. Transmission fluid, filter, open thermostat and new cooler. Oil cooler /double oil filter w 8 quart capacity, 160 degree thermostat, and a catch can. Everything running at 165 degrees now in Arizona. (note to Ecoboost owners. Ford puts thermostat in transmission only opens at 185 degrees to cooler. so tranny runs in 200's. Designed to fail, Period. Drop your pan and replace with a open thermostat and save your tranny. Also if you want to decrease carbon build up find a low evaporation oil (NOACK rating) Pennzoil ultra is very good and less expensive than big names. These plugs were the last thing. The plugs i took out were factory original. nothing left of barb. So surprised it ran as well as it did. checked old gap. They were beyond.035. Gapped these new plugs at .030. What a difference in performance. WOW. The turbo's are alive now! I also added 8 oz of NMF Ionic friction reducer to oil and 7 oz to tranny. I have a test drive loop that i use of 50 miles mostly with cruise set at 60 mph. new mileage increase of 2.7 mpg. I will post back in 5000 miles and give update. A lot of negative reviews here but had to give them a shot.

Worked fine at first, smoothed the idle till I couldn't tell if the car was on, felt the performance increase as well.After about 1000 miles had one failure and on the verge of another. I should have listened to the other bad review. Not worth it. Got the ngx iridium and runs fine now. These lasted me about 2 weeks and a drive from north Carolina to Florida. Packaging was terrible. I can only hope it didn't damage any coils and such.

Perfect. These are a definite improvement over even the older Pulstar plugs (I had the iridium) and a dramatic improvement over the Autolite plugs I pulled out. My engine went from being so hesitant I had to rev it to engage the clutch to being brand-new responsive, and that's at 137,000 miles. To be fair, I cleaned my air filter at the same time, so that may have contributed to the improvement, but I've never seen an air filter make a difference like THIS...

So far so good. No issues and 2014 F150 EcoBoost is reading no new codes.

Purchase with caution. Lasted maybe 1,000 miles, car started acting up. Replaced #5 cylinder coil, lasted a little, started acting up again (while out of town...at night). Had to nurse it home, with multiple misfires at this point, in a traffic jam due to freeway construction. Now I have issues w/ the catylatic converters, which are dealer only items because of California laws. These expensive plugs cost me additional down time and will need to replace two catylatic converters at dealer prices.

There was a defective one, but they give the car a kick.

i used these plugs on my Ford Fusion SEL and whaoooo i had the power with least acceleration and had a good gas mileage.thanks to Amazon

Failed in my car after 30 miles, got replacements from the company itself, failed after 2 miles. I have an 02 ford focus, when they work you can feel a difference but they only caused my car to stall and jitter. Completely unusable. Wish i could give a better rating but they didn't deserve it.