C5 life expectancy question
Well maintained, you'll find people who do significant mods to cars with over 100k miles on them. I've got a 2002 convertible with 33k miles on it, which works out to about 5500 miles a year. Much less might encourage things to age out. The '69 GT500 in my avatar has about 140k miles on it, but is averaging about 200 miles per year (car shows, and that's all), and needs more attention than the Vette. Condensation forms in motor oil that isn't ever gotten hot enough to evaporate it out (same for transmission). On the Shelby, it gets transmission seals about every five years - that's about 1000 miles. If it were being used, it would probably go a lot further.
Condition is more important than extremely low mileage. Look under the car, for indications it's been driven hard. The crash bars will always have a little scraping on them, but if they're significantly bent, it raises questions. Same for the little "skid" on the front of the K member. Rocker panels get cracked if the person jacking the car isn't aware of the need to add spacers to the jacking points.
A good inspection by a competent mechanic, solid maintenance records, and miles in the 5k-10k per year range is probably best. That means a 1998 car should have 50k to 100k miles, and a little more isn't terrible.
Cars are a lot better than they were when I was a kid. I still have my Dad's '57 Chevy, and you figured at 100k miles it was shot. You also figured on an annual tune-up, brakes every 10k miles (or less), pack the wheel bearings with the brake jobs, oil changes in the 2-3k mile range (Dad used 1500 miles).
I've got a 1994 GMC T15 Jimmy. The little critter with the sawed off 350. It's at 140k miles, and starts and runs great. No oil use, no smoking, good gas mileage. Regular maintenance was all it took.
Hope that helps. These cars (C5s) are incredibly durable with normal use and good maintenance, and anything can be made to fall apart with abuse.
I posted a couple of weeks ago about a guy showing off in his new CLK Mercedes AMG car. Massive burnout with the big ol' Michelin Pilot Sports, wind it all the way out, and hit an on-ramp hard. We had a good laugh - no plates on the car yet, and he wasn't aware that the local cop shop was right next to his on-ramp. My daughter laughed at him, then nodded when I talked about how foolish it is to abuse a new car. It was made for hard driving, but not in the first few hundred miles.
No way to know for sure whether the car you're looking at has been treated well. But if you're buying private party and talk to the owner, it will give you some indication. Carfax shows a notable price increase for verifiable one-owner sports and performance cars, and I believe it. The records, and (did I mention) getting an inspection, will tell the tale fairly accurately.
Good luck, and welcome aboard!



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