The oil and filter need to be changed at least every 10k miles or very 12 months. Changing the oil more frequently can do nothing but good and may delay or prevent entirely the common EGR failure on these engines. Good idea to change the oil feed and oil return pipes to the turbo entirely every four years or so because it's too difficult to clean them out. Timing belt, tensioner and waterpump every 60k miles. The timing belt is under its greatest strain first start on a cold morning. After that, not a problem. Your car will have the vastly improved manifold-in-head EA288 engine, which has a cleaner than clean bill of health.