Spark plug Autolite or Motorcraft

Autolite is the brand I got through rock auto.

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

I've put about 100 miles on them and the car seems just as happy as ever. Went for a spirited drive today out in the hills and the car felt responsive and strong through the power range.

Autolite a103 gapped to .055" will give you about a 5hp increase and last around 30,000 miles

autolites 3923 platinumsgave me the same mpg as the expensive NGK platinum.....

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

I replaced the original ac Delco spark plugs (shown in picture, THEY LOOK BAD) and put with new auto light ones and changed the wire as well. However, after doing so, my truck has been running really rough, almost like it's cammed and misfiring, when its rolling in drive it like to have a little shake.

As long as it’s not auto lite plugs you should be good. I’ve seen those things hinder 3 separate rigs from running right. Once one cracked 100 miles after installing them, half way through a trip we had to sop at autozone and replace plugs

Don't even think the Autolite or Bosch last as long as Denso/NGK spark plugs.