25th for me. Bosch platinums in my Mazda B2000 was going to give me an extra 20 horsepower back in the late 80s.

 

I bought the Split Fires and the Jacobs Ignition back in the early 90s. Guess we all go through it.

 

Im approaching 50! Sold every brand known to mankind for more than 20 years!

Dollar for dollar the best plugs around are Denso. They will run fine in anything you throw them in.

That said, I prefer and run Bosch.
Platinum Plus for the wife's Pontiac.
Super Plus in the Jeep.

Ron

 

Well call it what you want my my odometer dose not lie. You can hate life couse your old or take advantage of the hippies trying to help out the earth and creating more power on accident. Watched the dyno test myself.

 

Some things you just can't be told.

 

Dynamometers can be manipulated as easy as the people that "watch" them on tv.

I highly, highly, highly doubt you gained anything but a wallet that is a little more empty.

Worked in a shop for 6 years and have had countless people putting so-called "better" plugs into vehicles and then paying me to diagnose their misfire a couple months down the road. Gm gets delcos, fords get motocraft, mopar gets champion. No questions. Doesnt matter how cheap or how expensive the plug is, use what the factory reccommends and you will be happy.