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.
1 Oil Pan â one possible cause of an engine leak is that your oil plug has not been installed correctly. 2  A loose oil pan plug can leak in varying amounts out of the oil pan drain. Oil Pan â one possible cause of an engine leak is that your oil plug has not been installed correctly. 2  A loose oil pan plug can leak in varying amounts out of the oil pan drain.