296k on Motorcraft plugs installed at the required intervals w/ no mishaps. They're proven in my Ex. I wanted the Motorcraft Wires, but they were a bit pricey here and I wound up ordering NGK wires at the local NAPA store for about $56. They appear to be of quality construction. . . So far, so good.
getting a lot of good input. i wouldnt really have thought about, but when they did a vehicle look over while doing the brake lines, the mechanic pointed out that the orig lines and plugs were on it... at 215k miles same with oil filter. told me to go home and do them my self cause they charge out the @$$ to do em. so I wanted to get everyones opinon! thank yall!