BBC News | Sunken tanker Sanchi: Four oil slicks seen, says China BBC News Condensate oil, the ultra-light crude oil carried on the ship, differs from the thick black oil slicks usually associated with a spill. It is toxic, low in density and considerably more explosive than regular crude. Most condensates are also colourless ... Days After Oil Tanker Sinks, Large Slicks Observed In East China ... Oil from Iranian tanker wreck diffuses into four slicks in East China Sea: authorities Sunk Iranian Oil Tanker Leave Behind Two Slicks |