If there are noticeable oil leaks coming from the engine compartment area, check the following locations and ensure that all components, nuts, bolts and gaskets are mounted securely: 


Oil filter


Check if oil filter is secure, check for leaks. 


Gaskets 


Visually check all gasket area's for leaks.


Engine oil seal 


Check all seal's and seal area's for leaks.


Oil Sump


Check sump gasket and sump plug for leaks.