I change the oil myself every 5K-7K miles, and I change the filter every time. This is how I was taught to change my own oil, except with my last car I changed it every 3K miles because it used standard 5w30 instead of the impossible-to-find 0w20.

What I want to know is how to get those f&*@ clips off the underbody cover without breaking them -- they're about $2 bucks each from the cheapest parts place I can find... I break at least one of the nine every time I change the oil. Grr.