Since I am somewhat aged and a graduate of that "Old School" that a number of us can claim as our Alma Mata, I have a question concerning spark plugs. Are the iridium plugs that much of an improvement over the standard style that I have used for years. I know they claim hotter spark, increased mileage, smoother idle, so on and so on. Any users out there who can verify this and help justify their cost at around three times the level of the old stand by's. Yes I am considering a set as soon as I have the money saved, this extra cylinder thing is getting costly...........