Subaru XV Crosstrek oil leak issue with spark plugs and multiple gasket cover replacements on Subaru XV Crosstrek

Some Subaru XV Crosstrek owners report experiencing serious oil leak issues related to spark plugs, which require immediate inspection and repair. These leaks are often caused by failing gaskets or O-rings, but can also stem from failing pistons or worn valve guides. Common areas for oil leaks include the rear of the engine near the PVC baffle plate, the piston access plugs and crank seal at the front, as well as the spark plug tube seals. If oil is found on the threads and ceramic of the spark plug, it typically indicates that oil is entering the spark plug well due to leaking valve cover gaskets. Additionally, a head gasket failure can result in oil fouling the spark plug tip, leaving burnt oil residue. It is essential for owners to address these oil leaks promptly to prevent further engine damage and maintain optimal vehicle performance.