Does anyone know how oil gets inside the 02 connectors? I hear it flows through the wires. Reason is it's my second sensor in two months and need to fix? Any help is appreciated.

 

"Down" the wires maybe, not through them, you will need to find the source of the oil leak, that may require that engine is decreased and cleaned very well and then driven a little and then checked to see where oil is leaking.

MM&Y of car and engine would help. 94

 

It is 97 CRV with about 160k miles