Hello and welcome to JustAnswer!
I assume the smell is from under the hood area? If so then you have an oil leak somewhere that will need to be found. There areas where the leak could be.
One common leak is the valve cover, which will leak oil down to the exhaust manifold and down the back of the block.
The oil pressure sending unit can rupture and leak oil through the electrical connector.
The oil pan could be leaking.
The cam sensor on the left end of the head can leak.
The headgasket could be leaking. This would be most apparent at the left end of the end as viewed from behind and under the car.