Changing my spark plugs today and found the last spark plug on driver side has oil all over the plug and coil boot. In the past I have not had any problem losing oil. I read that it could be faulty coil or spark plug seal and worse case scenario leaking valve cover. Is this a major cause of concern? Can i continue to drive this for daily commute? No stores have any coil boots on stock.

 

I'm going to close this thread since you've posted about this in the engine forum.