i had champions in my truck for years...always ran good - no complaints
Then, one day a few years ago i was on here and i read a guys review on autolite plugs 3923 (i think is the number)
I decided to go down and buy some to try.
Now my truck was running great with the champions so i figured if it runs like crap, i can put them back it
I installed the autolites and my truck has never run better! It revs quicker, idles smoother, pulls harder....
for my truck (every truck is different) it was night and day
Those plugs are still in my truck today and it runs fantastic! I will never go back to champions for my truck - autolite only
I always wonder how many guys say their truck runs really good, not knowing that switching plugs can make a huge difference!
anyway, thats just my truck and my opinion!