its recomended to change it after 3000 miles but in owners manual is written to change oil and filter every 5000 miles. I used to live in Europe where people change oil every 6500 miles (gasoline engines not diesels) When I came to America I thought it is a joke to change oil every 3000 miles that is why i ask this question. What is more famous european technician told (on a radio) that change oil every 3000 miles is not necessery and people can change oil every 5000 miles. Please help me I am really confused (info about changing oil in owners manual i have found on www.myfordfocus.com)