Follow this video link:   http://m.youtube.com/watch?v=DHKBY9C4pBA&desktop_uri=%2Fwatch%3Fv%3DDHKBY9C4pBA conoco_philips_props_in_dryock Zero Oil Means Zero Environmental Impact(The Naval Architect, May 2012) Seawater lubricated propeller shaft bearings use no oil-based