I was wondering if there is a difference in platinum spark plugs. I see that autolite and champion and ngk all make replacement plugs for our car but the prices differ by alot. The champion and auto lite retail for about 4 dollars each, but the Ngk retail for about 12 dollars each. What is the differnece?

 

Go with the NGK's, you get what you pay for.
From what I hear the differences are night and day.