Spark plug Champion or Autolite

You can get the champion version of the RS7 plugs for less than $20 a plug and they’re working great on my car!

Autolite is the brand I got through rock auto.

These were actually alright spark plugs. The ceramic is a lot tougher than normal ceramic, and the electrode is larger. They were marketed as 'truck plugs', but they're really good in old tractors and farm equipment. They last forever.

The plugs are great-- zero issues, can't tell a difference.

These are Autolite plugs, not Motorcraft. Which means the plugs in this vehicle have been changed before, that probably has a little to do with why it was easier than usual to get these out. By the looks of the plugs and the lack of carbon buildup and corrosion (the two factors that cause these plugs to size the most) I'd say they weren't in there for a very long time either. Going by my experience with Autolite plugs in Fords (very little experience as I work on Euros mostly) if they don't start misfiring right away it's usually within a couple of months.

Do yourself a favor and throw Autolite plugs in the garbage.

Side note, Champion spark plugs suck. Use them in lawn mowers.

Definitely do NOT recommend Autolite spark plugs.

Don't use autolights. AC Delco for GMs & Motorcraft for Fords. Modern ignition systems are sensitive to plugs so I use whatever the OEM does (within reason)

Auto lights are trash, Bosch too. I can’t tell you how many times I get a misfire diag that the customer already put plugs in, only to find the garbage auto lights are the issue. A set of oem plugs always fixes it