The fuel shipping fleets are allowed to use is poised for a drastic change. New IMO sulfur rules are geared at cleaning up air quality, but they stand to rattle the fuel supply chain, with big implications for diesel prices. Many questions remain, ranging from the availability of compliant fuel to how the industry will handle new regs. Listen, as marine fuel expert Tom Sosnowski, fills us in on what the industry can expect as the market looks ahead to 2020.