Spark plug OEM FORD or Motorcraft

I however replaced mine with motorcraft and do not have pinging anymore but still run 91 octane as 93 isn’t common in socal.

Until I replaced the plugs, coils, alternator, starter, battery and cleaned connections all I could, this problem persisted and my vehicle killed a coil / 2 every season.

On any of the gas trucks with the "modular" engine family (4.2 V-6 and 4.6/5.4 V-8) it seems like if you use anything other than Motorcraft spark plugs and coil packs, the engine won't run right at all, no matter the brand.

When I had my Ford Raptor tuned I went with these as recommended by the tuner and they have been superb

I always stick with Motorcraft double platinum, or Autolites if they aren't available. No reason to get fancy with sparkplugs.

I got a Ford, so I use Motorcraft. They work great.

econolines are ok except for one huge cluster****. On the late 90s through 02 i think they built them with too few threads on the heads for the spark plugs. Consequently spark plugs routinely blow out.