Actress Hailee Steinfeld pairs a navy-and-white dress with white strapped sandals at an event in Los Angeles in 2013.
If the oil is on the inside parts of the spark plug like the bottom insulator, that's a bigger issue, you have either leaking valve seals or very leaky piston rings. If your car blows a puff of blue smoke on startup, you probably ave leaky valve seals. If it blows blue smoke all the time, leaky piston rings.
If you smell oil burning, this usually means the leak is originating from the top end of the engine. The smell of burning oil generally come from oil dripping on the exuast manifolds. Look to see if you have stains around the valve covers and make a habit of checking your oil level weekly.