If it is enough to trigger the female "car nose" (no offense intended, ladies, but males seem to be more paranoid on car smells - however, women can usually sense by smell from the living room that the trash in the garage wasn't taken out
), then you might want to check the smell out a little more... given that you are new to the car, I'd be sure to check the fluids levels and maybe stick my head under to see if anything obvious is happening like an oil drip, etc...