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.
When you remove the oil cap(while the engine is running)and break the valve cover's air-tight seal it prohibits that from occuring. This creates a vacuum leak. Vacuum leaks cause your idle to lower and usually make the engine struggle to run at all. Quote: