I got one for my Bonneville last year. I called the dealership and asked what kind of oil change. Of course, it was the basic with non-synthetic oil. I asked about the cost difference to go synthetic. The service manager told me that I could bring in my own oil and they would fill it with that for no charge. So, I was off to Walmart for a $24 jug of Mobil 1. I only used two of the oil changes, but it was nice to get them done for only the cost of the oil.