Alex, go with the 10,000 miles changes, I have been owning my Jetta TDI for the last 6 years, using 5W40 Synthetic oil ( Delvac 1), the engine still purrs like a kitten. Rotella 5W40 (Wall Mart) or Valvoline power purple 5W40 (at NAPA stores) will do just fine. Don't listen to people who get...