As far as the oil changes go if you go to a service shop yes it'll be 120-130 a pop. The intervals on synthetic should be around 6-7k miles before you have to change again. If you buy the oil and filter and do it yourself your looking at a low of $65 to $80 for 9 quarts of Mobil 1 and a filter. I just did mine by myself SUPER EASY and it cost me 65.71 after tax for 9 quarts and 1 filter. Hope that helps!