Quote Originally Posted by wvprix View Post
your oil filter is still rated for 3k miles.
Unless it isn't. For $9, I can run a 15,000 mile filter that filters better than a 3,000 mile filter and is made of higher quality parts. There's various discussions on such things elsewhere on the forums, though. And that being said, the only way to know when you should change your oil is to keep testing it to find your limit, which is different for ever car and driving style.