The plugs all were 3 thousandths wide, all have a nice tan side with slight rounding of the electrode on that side with the other side white and straight and like new, just like in the pic attached. The dark side of the electrode looks darker in the pic than it does in person. I would say, unless I see a huge gain in gas mileage, these plugs are good for 50k at a minimum. I was still getting low to mid 20's with the old plugs, back when it was new I got high 20's and even 30's sometimes, so we will see. However it ran great, no appreciable loss of power, I haven't taken it out yet to try it out since I got it done late in the day today but I will update my post when I get the chance, working all week though, so it may be a few days as it's not my DD.
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