Synthetic Oil

I have a 2005 Saab 9-3 and was told when it was purchased that it ran on synthetic oil that needs to be changed every 15,000 miles. But, my mechanic said that it actually is more like 7,500 miles driving in a city. Synthetic oil changes cost like $50. So you really don't save any money, but maybe a little time.

Here is what The Honest Mechanic says.