Have you been keeping on top of the regular maintenance intervals? If so, then there isn't much you need to do at 100,000, as the big maintenance interval is every 60,000 miles, which won't occur again until 120,000. I change the coolant every 50,000 miles using the extended-life stuff, so that's pretty much all I did at 100k.
'96 Contour SE, black / opal grey, MTX, every option, KKM intake, resonator removed, Flowmaster Series 40 DeltaFlow, GoodYear Eagle HP's, 115k miles, new paint 7/01. Driven cross-country 4 times.
'70 Corvette Stingray Coupe, Cortez Silver, 454 bored to 462, Muncie M21, too many mods to list, lots of fun. 335 rwhp / 365 rwtq
'02 Corvette Z06, Electron Blue / Black, every option. Stock for now...
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