Thank you very much, I was indeed investigating and I think the problem may be inclined to the oil viscocity, (although it may be that the takis are already spent) that is, apparently they recommend using a multigrade oil 15W 40, this because of the engine wear since it has 170,000 km. One more thin can produce noise or greater oil consumption, it is a matter of trying, so I am going to change the oil for which I already comment how the engine will already be informing if the noise or continues is removed.