Spark plug NGK or Denso

Im tuned and on an E85 mix but using 1 step colder NGK's (#ILZKBR7B8DG) gapped to about 0.022...needed these before I even went MHD though. Once I did most of my maintenance, the car required this for proper spark. Night and day of a difference.

I still put a small dab even though the NGK plugs recommend against it. I change my plugs every 15-20k because I have a tuned Focus ST. I already went through 3 sets of NGKs with no problems doing the small dab

I've had multiple Chevy engines that gave random misfire codes with autolite plugs- then ran fine on ngk.

If you want relatively inexpensive and decent look up whatever NGK plug is correct for your car.

I find the car runs way better on the Rutheniums, and I find that the plug gap doesn’t open itself up over time like it was with 6510s.

I went NGK and noticed a small bump in throttle response, changed mine at 100k Km (60k miles) and they were honestly good to throw back in too, so not like the plugs were burnt or fried!

I’ve been running NGK Ruthenium plugs on my stage 1 GTI for 20k miles. No issues.

I use Denso IK20TT and these spark plugs work every time, on both fuels.

I noticed a slight miss at while cruising between 67 and 70mph. I ran VCDS logs and found misfires on cylinders 3 and 4. Imagine my surprise when I pulled the plug for cylinder 3… no signs of any other damage and I have no idea how long it’s been like this. Never got a CEL.

I installed the new NGK Ruthenium HX plugs and so far everything has been great ????

I have the 24's, not impressed.