Spark plug NGK or AC DELCO

I have had no problems using the NGK BKR5EKU plugs. I do not spend the extra money for the platinum version. The copper plugs are fine.

On a stock or chipped VR, the NGK platinum OEM plugs (BKR5EKUP) are pretty good. I have tried the Bosch F6DTC (16V copper plugs) and NGK R5671A-7 (copper) for about 10K and 6K miles respectively on my supercharged VR and both seem equally good.

I know LOTS of people running NGK BKR7E's who are chipped w/o problems.

FWIW.....an electrical engineer friend of mine with a custom turbo BMW z-3 with over 500hp/500ftlbs at the wheels, did the homework and said NGK is one bad A$$ plug......he said unless you get into the really specialty racing plugs NGK is where it's at.....i say for the same money go NGK as soon as i get 20,000 on my 03 the NGK's you mentioned are going in for sure...$2.50ea was what i was quoted near me seems cheap enough compared to the $17ea BMW plugs i sell at work

I've noticed something interesting about the NGK BKR6E's that I'm running. #1 - They respond extremely well to the chip and the N75 J valve. #2 - I've also lowered my gap from .032\" (stock spec) to .028\" to reduce the possibility of misfires under high boost. The bottom line is that the BKR6E at .028\" is a great plug for the 1.8T AEB motor.

Im using BKR7E and I can say for $10 it made my car run so much better.

I have NGK iridiums in my car, I have always had good luck with ngk plugs in any car or bike.

I bought a set of NGK BKR6E plugs and gapped them to .032\". It seems like they are just fine for the 1.0 bar chip I have. I don't feel any change in acceleration so, the previous Bosch F7LTCR plugs must have been ok. Eitherway, I'd rather have the NGK's due to their price and easier gapping method.

I use NGK BKR6E plugs I switched out my factory Platinum for these beacuse alot of people on Audiworld did. They all said that it had a smoother idle with the coppers. They were right.

Put them into a stock '87 Subarban and tore my hair out thinking I messed up the wires 'cause it idled so bad. Really, like I had two wires switched. Put the old worn regular AC's that I just took out and it idled perfect.