2 common places for oil to leak from and drip down onto the exhaust causing the burnt oil smell, are the oil cooler or the turbo oil feed line. Please search the forum 1.4 "how to" tutorial thread to become familiar with these and figure if you can diy. Or at least you'll have knowledge if you go back to a mechanic. If you diy you will get lots of help from members here
2010-2016 (Gen1) Chevrolet Cruze engine, transmission, tuning, and performance discussion.