So lately, I've been smelling a slight engine smell inside my car.
1.) it smells when i have the heat on
2.) its only in two of four vents
3.) it only smells like that until the car heats up and i get going.
4.) and cars a 2010 Hatchback. LT

I did recently have an oil cap leak but that problem was solved by just tightening up the cap.
Any feedback?