2360 votes
I installed the NGK PFR7S8EG laser double platinum. They came gapped at .032. Initially I installed them at .032 gap and just yesterday I closed the gap to .028. Car runs strong and idles smooth at both gaps.
Subaru's like NGK (OEM) spark plugs and O2 sensors, respectively. They run poorly and will even throw codes if other parts are used.
I don't cheap out on the car so everything i put most by a name brand. New Parts; 37. NGK Spark Plugs
Replaced old plugs, DENSO W20EXR-U, with new NGK BPR6ES. Idles a lot more smoothly now.
I prefer NGK for both plugs and wires.
Just wanted to let you know i done the change and it was the easiest one i have ever done in my life! I went with the NGK Laser Platinum PZFR5Q-11 , but wanted to let you know just in case it could keep some out there from not checking the gap on these plugs prior to install. I thought they were supposed to come pre-gaped, but every one of them were set @ .040, instead of the manufacture recommended .044. Anyway, glad I checked, and thanks for the reply!
I use cheap-o copper NGK V-Power all copper plugs on my M Roadster that produce max power (according to a cohort of enthusiast whack-jobs who repeatedly dyno their cars to look for .0005% differences in power output), but need to be changed every year. No problems thus far.
Went through both ngk and autolite, didnt like they're spec'd plug for it.
Most imports (To the US) don't like anything but NGK/Denso.
I have replaced many brand new NGK's in newer chryslers after the customer gets them from a parts store. NGK's can and will cause ignition coil secondary circuit codes. Also, on hemi's they will set asd control circuit codes and cause the car to stall.
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