Spark plug NGK or OEM Subaru

My personal experience is that NGK brand for any type of spark plug is superior to others in all vehicles. I use the NGK iridium plugs in my Rabbit and my Honda cars. My older Miata had a wasted spark system and required a change interval of 30K miles, regardless of the plug, so I used the NGK copper plugs in it and there was no difference in performance at all.

I've been running the oem ngk's with the is38 and have never had an issue. They are gapped a little tighter per APR's recommendation but that's about it.

Ended up getting NGK.

I did the plugs around the same mileage in my 2014 CX-5 (2.5 liter), last April at 65,000 miles. Used the comparable NGK Laser Iridium plugs. Mine had some carbon buildup but all in all, they probably could have went longer.

Since then I have take good care of it, replaced the brakes on schedule in August 2020 and then in August 2021 new spark plugs.

I use the NGK 1675 and have and factory black coils and haven't had an issue. I have had issues with with other brands.

NKGs are the exact same plug just different label and cheaper, and are much better than the stock plugs.

On NGK s website it says laser iridium (the oem ones) are good for 100k miles.

I changed spark plugs to NGK laser platinum plugs with a 0.32 gap. The issue only arouse after I got the tune.

Went through both ngk and autolite, didnt like they're spec'd plug for it.