Originally Posted by GreyScorpion
Thank you for real numbers and the efficient use of data logging. To many people say blah blah blah copper is no good. Here is proof they improved your cars motor.
In NO post, NO post does anyone mention better MPG's, so whoever is hung up on that, please put it to rest. The use of AR 103's is for a better idle and a couple HP gain. Thats it. I thought my car had a bad motor mount because the vibrations, I installed AR103's gapped at .050 and its very smooth, has been for 15K and since it cost me $12, they will be replaced with the next oil change.
It's actually mentioned several times in this thread:
The Duratec Sparkplug Sticky
Hence my interest. Another oddball thing I noticed; I used to run Denso Platinum Twin Tips in a 93 Corolla... great plugs but after the first 20k you needed to regap them. I noticed that their P/N for this car is equal to Autolite 105/106. Odd that it would sold as a direct replacement if it's equal to a different Autolite heat range; not going near those at any rate haven't heard any nice things about them in this car.