Right now my Mazda3 has about 13,000 miles on it and is about 16 months old. It will be time for an oil change when I return home from school later this month and given the age I want to get the 15,000 mile service done. However, I am afraid that this will set me back hundreds of dollars given how much oil changes at the dealership have been. From your experience, how much should I expect to pay for the manufacturer's service?