Spark plug NGK or AC DELCO

I have NGK double plat and they have been great. Over 10k miles. Just put some in my girlfriends 2.5 jetta as well with no issues.

Use the NGKs OP uses with factory gap. All stock apart from Stage1 Superchips tune now on 95RON. No issues 'cept consumption's falling now cooler temps are here (46\u00baF yesterday afternoon SE London) from 40+ on lightfoot long run to 36MPG same motorway run

ngk Same as prof315-jeff,bkr7eix on both setups,supercharger and now turbo and they still work,my only mishap is i bought a set bkr8 and one fouled do to much gas @ idle,now with megasquirt no problems so far.

i know of several 2.5T and 2.0T (big turbo) running BKR7EIX gapped at 0.028"... Myself included, and no issues.

I am running those in my car now and they are perfect!!

Personally I prefer NGK and have had excellent results on our customer's cars with NGK. They make a great plug.

On almost all FSI / TSI applications we prefer the NGK, either PFR7S (which is the 'oem' plug on most TSI engines we see) or PFR7Q gapped to .028. We have had bad luck with missfires with the Bosch on tuned cars. Stock seems fine.

While I had the coils out, I replaced the plugs (used ACDelco double platinum professional grade, proper gap. No NGKs were available). After I replaced the coils, the misfire code(s) went away for a few days.

I had NGK PFR6Q and it ran fine. But... now I use the stock NGK plugs

I went with some NGK coppers. I dont know the exact part numbers of them but the ones I got were crap lol My MPG went down to 19 mpg.