Based on several posts it appears that getting Mobil 1 for free is dealers choice. I was first charged $82 and when I called back to the dealership they decided to refund me the money. Others have posted paying a bit over $100 for Mobil 1 while other have gotten for free no issues.
Rock, my suggestion would be to call ahead. If they want to charge try another dealership.
Rock, my suggestion would be to call ahead. If they want to charge try another dealership.