You certainly can't go wrong with having the dealership change your oil. Having said that, dealership service centers can and do make mistakes. They are trying to get vehicles in and out quickly. That can lead to mistakes. I've read too many reports of dealerships over or under filling the oil to trust them. So I change my own oil and filter two times a year. Once in March and once in September. I use Pennzoil Ultra Platinum synthetic 5w-20 oil and NAPA Platinum oil filters. If you really want the dealership to do the work you can always provide the oil and filter of your choice and have the dealership change them. That way you're providing them with the correct amount of oil, which will theoretically ensure they use the correct amount. The last time I had a dealership do that they forgot to use my oil and filter. It was still sitting on the floor when I picked up the truck. At least they added the right amount of their bulk oil LOL. Now I do it myself.