167,000 miles
I use the car mostly for a commuter vehicle–50 miles a day, between 45-55 mph (on state and local roads without much stop and go) with a once weekly trip that is longer–up to 200 miles. Occasionally, we use it for a longer trip (300-400 miles).
The oil change regimen is a little hard to answer-- my husband notices that it’s time to change the oil–and tries to do that every 3,000 miles. I don’t really notice anything about cars and tend to let it go a little longer, may be 5-7,000 miles. We always take it, either to an oil change place, or to the mechanic when something else needs doing.
As far as we know, the PCV valve has never been changed. Don’t know about that little old lady, though.