First off I was referred to this site and it's a great site...........TONS of info and opinions. lol! I recently bought a new F-150, it has 2,000 miles on it. I have not changed my oil for the first time yet. I questioned someone about first oil change mileage and I was told that it didnt need to be changed at 500 miles. I come here and read that I SHOULD have changed it at 500 miles. Have I possibly caused damage to my engine by not changing the oil at 500? Another thing that I have read here is about filter changes. A lot of people dont change their filter everytime they change the oil. I have always changed the filter with each oil change. This info really surprises me.