Cool idea, but I see some problems: * Car dealers make a lot of money on servicing their customers' cars. They don't have much incentive to make DIY easy, and

Cool idea, but I see some problems: * Car dealers make a lot of money on servicing their customers' cars. They don't have much incentive to make DIY easy, and may work actively to sabotage a project like this. Unless you build relationships with dealers and manufacturers into your business plan from the beginning. * DIY car seems to be dead or dying. In the 1970s, everyone knew how to change their oil. I'm not sure how many people in 2012 even know that oil is a thing that their cars consume. It might be very hard to achieve critical mass for a project like this. * There are a lot of forums dedicated to various makes and models of cars. When information is available, it is usually easy to find there. * Since this could be readily perceived as cutting in to the income stream of mechanics, you'd want to find some reason for them to buy into the project as well.