Personally I gapped my NGK laser iridiums to .024 and I've had no issues what so over, I did however have issues with the OEM spark plugs when I pulled them out to which they were gapped at .054, which OEM spec is technically .034
I swear by NGK
Apart from that, NGK is my go-to brand for everything they make.
use beru plugs rather than Bosch, a lot of Bosch plugs sold for this application has the wrong heat range which can cause misfires.
NGK iridium for plugs.
I set the new ngk's i put in to 0.27 and I feel a difference already lot less hesitation off the bottom end felt like it would almost hiccup before gaining any power with the stock plugs. now i lay into it and it just goes fairly smoothly
Just installed NGK 92274 in a 2021 Mazda 3. They are 'Ruthenium' instead of iridium, seems to be their newest plug available. Just don't touch the gap, it was perfect at .044. Runs great.
Have used NGK on every vehicle I've ever owned. They've often lasted the life of the vehicle.
Here’s a link that may be of help. Your plugs are quite fouled and even at end of life plugs should not look like that.
Don't think the platinums give much of a performance advantage and they foul faster if you've got any oil burning going on...
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