miles. I completely attribute my old OEM motor/turbos going to 220K miles before the chassis was hit to running Mobil 1 5w50. I recommend trying any of these Mobil 1 oils from first hand experience: 0w40, 5w40 (called Turbo Diesel Truck, but still works great in gasoline cars!!) or 5w50. Any other brand with a slightly thicker warm weight will help as well.