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.
A drain plug with worn threads can also cause oil leaks. Another... Some causes of vehicle oil leaks are worn or improperly installed oil filters, broken oil pan seals and loose timing cover seals. A drain plug with worn threads can also cause oil leaks. Another...