96 993 C4S on craigslist in Seattle
#16
Nordschleife Master
Definitely a 90K service and that would include plug wires for sure BUT, my '95 coupe had 87K on it when I bought it and I sold it at 92K. It didn't burn a drop of oil between changes (1 quart every 4 to 5K if that ...) and it was starting to just slightly 'weep' at the timing chain covers. There are plenty of owners on here with WAY over 100K on their cars that have not had to do anything to their motors other than routine maintenance, however, the dreaded CEL for clogged SAI ports is the issue as you approach 100K .. it happens and usually means valve guides which means you might as well do a top end rebuild. I know FDM offers that for $5K which is a smokin' deal and I consider myself fortunate to live close by .. but I've heard shops charging upwards of $8-10K for the same service.
#17
Nordschleife Master
My 95 C4 has 110,000mi on it now, & I burn almost a qt quart a year (around 10kmi). It did wonderful on the dyno, 255 AWHP. I know it will happen, but who knows when? On my 90k service, I did the plug wires, & distributor belt. Both were in great shape, & could have waited quite a bit longer.
Bottom line, if a car is well cared for, it will take care of you.