Had first oil change at 1,000 miles. Now have 3,000 miles on car. Should I change oil again at 4,000 miles and then every 5,000 miles thereafter? The reason I had my oil change, free 1 oil change from dealer, at 1,000 miles is because there is always contamination from castings, dirt, etc. on a new engine. I will be using a well known oil and that oils manufacturer of its own oil filters (yes, I know, their oil filters are probably made by some other entity) But I want an oil folter with a cotton or synthetic media besides paper.