It's why most high-mileage motor oils (like Castrol EDGE High Mileage 5W-30 or Pennzoil Platinum High Mileage 5W-30) claim to last 15,000 miles or one year between oil changes. Advanced anti-wear ...
Others might use a 5W-30 synthetic blend. This is all to say that your car wouldn't know if you're running Castrol or Mobil ...