I have my first service coming up at the 4 month mark, I have the little wrench icon just turn on and I have only 2600 miles on the car. Quick questions - I have the first 2 oil changes covered by the dealership (they gave me coupons when I bought the car). I'm pretty sure it's for regular oil and filter. Is it worth it to switch to full synthetic/Mobil 1 filter at this time or should I just use the conventional oil for the 1st 2 and then switch? When did you guys switch to Synthetic oil? At the first service I see it's just the oil change and some cursory inspections right? How much did this cost at the dealership?