The NGK 5690 is a clone of the Bosch copper nickel FR7HE02 it’s cheaper and runs great in a 2.5. It’s actually oem for 170hp 2.5. Change it at 40k. It’s the last plug VW put in 2.5s so it should be the best one. It’s one notch colder than the NGK laser platinums. The NGK 5690 will allow the motor to pull more timing and more power. For best results use 91 or above. It’s even in the owners manual.
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.
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've seen with a digital tachometer a 1,000rpm difference between a laser brand spark plug and the oem ngk spark plug in a chainsaw. So for me it's what the oem uses is what I put back in.
Subaru's like NGK (OEM) spark plugs and O2 sensors, respectively. They run poorly and will even throw codes if other parts are used.
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