Is 190560 miles on a 98 Honda civic lx considered high mileage?

My sister gave me her civic and it runs great. There's hasn't been major problems since I've had it, other than the coil. With the right amout of money it was an easy fix. I've been wanting to change the oil but the guy at Wal-Mart suggested that I use the high mileage oil. I don't think it'll really hurt my car at any rate but is my car really high mileage?

Yes. After 150k miles, expensive problems start to happen for even the most reliable cars.

This depends on how the car is serviced, would suggest you change the oil filter as well as the air filter, when you change the oil

No, that is a 17 year old car and the average driver puts 12,000 miles a year on their car.

Yes.

Yes, by any standards and for any type of engine, except maybe diesels.Don't waste money on special oils, keep using the one you have used in the past, but make sure it is changed (together with the oil and air filters) at regular intervals.