Spark plug Motorcraft or OEM Subaru

I have about 30k on my plugs (Motorcraft OE). I've no problem buying them again as they've held up great

Oem Motorcraft plugs are always my go-to. They generally last around 80k miles.

Modern Ford engines tend to work best with Motorcraft or NGK spark plugs.

Motorcraft is all I use , heard to many stories about aftermarket plugs causing misfires

Changing my sparkplugs for the first time (32k miles, yes it's early but I got a great deal on the plugs) and found that the stock plug in cylinder 4 actually had a ground electrode defect and was significantly thicker than normal. The car runs stronger than it ever has as this was likely causing extra timing pull.

im at 95k with the original plugs. no issues

I waited till like 100k to do my spark plugs on my 2013 Crosstrek, they were still good just not as efficient

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?

Good luck doing spark plugs

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.