Hello friends. According to the conditions of use for the periodic maintenance interval in the maintenance manual of 206+ diesel, it has been written as 1year / 15000km or 2years / 15000km. I asked the new service to the vehicle, you will come in 1 year or 15000km or your warranty will be invalid. I do not go too far, I said if I bring it every 2 years after the guarantee. The room retains its motor oil feature for 1 year, it will deteriorate after 1 year. If there is such a thing as staining in the engine oil, if there is such a thing, it gives approval in the maintenance manual in 2 years according to the conditions of use. Or are the services trying to send us out? We obviously do not go the long way max. We use 5000-6000km & nbsp; and usually at short distances in the city. I would appreciate if those who have knowledge on this subject write an answer.