I am amazed the amount of techs I encounter that swear by 3,000 and sometimes 5,000oci. there motto seems to be oil is cheap. I agree with the motto but when you mention things like the owners manual says 7500 or 10,000 they respond with the manufacturer wants you to have to buy a new one in x amount of years. I used to always do Dino oil every 5,000 the focus has gone about 5300 and I start to get anxious because I want to change it. And I do feel like 10,000 is am awful long time but the rational side of me says its completely doabe . Amazing how you can feel both ways about a particular situation. I often wonder why techs dont usually agree to listen to the owners manual. Have you noticed the same trend?