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Do you have ngk or motorcraft sparkplugs?
I replaced everything with Motorcraft plugs and wires and it has run great since.
I also put Motorcraft new plugs back in. Truck is happy. I'm happy.
I have about 30k on my plugs (Motorcraft OE). I've no problem buying them again as they've held up great
Ive ran Beru ultra copper core for a couple months now and they are one step colder. I honestly dont even check gap on them and my shit runs smooth.
I use only NGK or Beru spark plugs.
switched to the back to the motorcraft spark plugs $15 a piece fixed it for a while
I heard from an old ford mechanic once that ford designed their ignition system around the motor craft plugs and no other brand plug will run right if installed. Since then only motorcraft or autolite in my fords.
Has anyone tried the Motorcraft SP594 plugs? They supercede from the SP542, which is said to be a 1 step colder plug for our cars. Currently running NGK 6510s but i think i got a "fake" set as i paid like $30 from Amazon for them. The SP594s I can get for $41 from Ford... so anyone have good results?
That's better than the Motorcraft plugs I received from Rockauto. They were bouncing around (no longer in their original little boxes) in a large shipping box with 2 sets of brake pads.
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In March 2026 on PartReview, spark plug Motorcraft were overall better than BERU.
In March 2026 on PartReview, spark plug Motorcraft were overall more popular than BERU.
By vote balance, spark plug Motorcraft surpassed BERU:
By number of reviews, spark plug Motorcraft surpassed BERU:
In March 2026, according to PartReview, spark plug Motorcraft and BERU have not taken top places in car-specific ratings. You can help by adding your review about these manufacturers.
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For example, comparisons of spark plug Motorcraft with: NGK, Bosch, Denso, Autolite, Champion, AC DELCO, BRISK, OEM Volkswagen, OEM Toyota, OEM FORD.
Also available: comparisons of spark plug BERU with: NGK, Bosch, Denso, Autolite, Champion, AC DELCO, BRISK, OEM Volkswagen, OEM Toyota, OEM FORD.
You can also see who is better among other spark plug manufacturers: Bosch or NGK, NGK or Denso, NGK or Autolite, NGK or Champion, NGK or AC DELCO.