97 Mercury Mountaineer 5.0 V8
Well, I guess you could say these plugs went 100k since they are the original plugs from a 97 Mercury Mountaineer with 133k on the clock. The owners main complaint was poor gas mileage, 8-9 miles per gallon. This thing actually ran well and it was hard to believe after getting these out. All of them came out easy except one and some penetrant helped in its case.
No doubt these are the original, look at the corrosion on the plug shell. KV readings were in the 19-20 range on most of them. I'll bet the coil pack was happy to see these go.