Well, the manual have two "options" severe and normal driver, severe drivers should change the oil every 3000 miles and normal driver should change the oil every 5000 miles. I fall into the severe driver category thats why I always change it every 3000 miles, I just started changing it every 2500 but that may be wasting money so I might go back to the 3000 miles lol Ya'll have different preferences I see, I always rather to use 10w30 high mileage oil but like I said before, now I have to get whatever is on special as long as it don't look bad quality!