Does heavier crude oil sink in water, and is it harder to clean up?

Claims that diluted bitumen (dilbit) spills are harder to clean up, and that they represent a higher risk to human health and the environment, are inaccurate. 

Claims that dilbit is unique, and will therefore sink in water bodies, are unfounded. This potential exists for all crude oils under certain environmental conditions. While unlikely to occur, every spill of petroleum products is unique, and Enbridge maintains the capabilities to safely and effectively respond to any incident.