Spark plug NGK or AC DELCO

Replaced old plugs, DENSO W20EXR-U, with new NGK BPR6ES. Idles a lot more smoothly now.

I did put ac delco factory iridium plugs from rockauto on mine at 100k.

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.

I use NGK's, and they seem to do just fine.

Oil change every 5-7k miles Mobile 1 European Formula (0w-40) Seafoam every 5-6 months New NGK Laser Platinums Plugs (500mi ago) 1 new coil

I run the DCPR8EIX and they are great. No need for 9's for me.

I have tested the BCPR7EIX which did not make any difference to my car. I felt that the standard plugs worked well vs these.

I'm having the exact same problems with my 01 GTi VR6, ive replaced the coil pack and wires/plugs twice within 20,000ish miles...