I agree with you 100%. When I first did my 30,000 mile "tune-up" I purchased a set of the Denso plugs and ran them for a little over a month. Then, just for shi$% and giggles, I ordered a set of the Motorcraft copper plugs. Not only are they a quarter of the price, they feel exactly the same on start-up (fast), low revs, but the coppers feel better up top. I think the last part is due to the fact that I was able to gap them to .060 with no worries, where as I was afraid to gap the Iridiums too much for fear of breaking the tip (and they come out of the box with a tinsy tiny gap- less than .040).1turbofocus said:My guess would be that all that voted for the denso plugs did it by opinion and have never done any testing on a Focus to back it up or they were selling them
I have dynoed both plugs and have found no gain one over the other
Platnum and iridiem and all the other fancy stuff out there over time has proven to me to be worthlessbigb7000 said:Tom
What are your thought on the NGK Iridium IX plugs LTR5IX-11?
I installed them and noticed my surging was gone and the power of a new plug as expected.