What spark plugs should I use?

[chance93]

I have a 1993 mustang with a 306 and I was wondering what would be the best plugs to use in it. I have autolite 25s in it now.

 

[Mustang5L5]

N/A?


What you have in it is pretty much good, but in the future i'd run OEM motorcrafts. Their specs are tighter than the Autilites

 

[chance93]

yeah is n/a. Thanks for the info.