2007 Impreza burnt oil smell

[xochitlfun]

Hello friends, recently bought a 211k miles driven Impreza EJ25. When i first drove it for a couple of days i noticed no burnt oil smell. It’s only after a spark plug change and oil change this started happening. This ONLY happens when the car starts from a stopped position, ie. when car is at stoplight, put into first gear and start gassing it. Stumped on if its something i neglected to smell before, or if this is a result of the maintenance i did on the car.

 

[garry6913]

Probably spilled oil on the exhaust pipe. Or the heads or oil pan are leaking on to the pipe