I dug up this old video of mine where I'm changing the oil and filter on a 2008 Nissan Altima 2.5 S sedan. If you watch until the end, you'll see the mileage since the last oil change which is 12,335 miles. I only did this once, and you can see how dark the old oil was! I normally change every 7500 miles or twice a year. It doesn't matter if I use dino oil or synthetic or which brand is on sale. I just change it and call it a day. The car has over 212k miles on it today.