Had a neighbor that drove her Corolla a lot and never did a oil change in the few years she was a neighbor. The thing was beat and she drove it hard. Just add oil when needed she says. It looked bad, ran bad, but she drove it hard day in and day out.
I don't know how many miles she had on it, but she sure was always in & out of the neighborhood a lot. It smoked so she must have been adding oil on a fairly regular basis. It sure was a beat-up piece of junk. Screaming belts, ear piercing brakes, dented rusty body, cracked glass, leaky exhaust, bad tires. Guess she wasn't embarrassed when we teased her about it. Total abuse and it shouldn't have been on the road, but she didn't care. & big wet oil on her driveway.