I had mine changed to a syn blend at 1500 miles. It now has 6000 miles. No lights have come on asking for the oil to be changed. At this point I'll change the oil every 5k miles regardless and have the dealer do the oil change. They want me to use an oil additive that increases the life and quality of the oil. Dont know about that but its cheap so I'll go with their recommendation. I've checked the oil and its full and very clean looking right now.