The global bunker fuel market size was valued at $120.1 billion in 2019, and is projected to reach $130.1 billion by 2027, growing at a CAGR of 3.1% from 2020 to 2027.Bunker fuel is a fuel oil used in marine vessels. It is poured into the ship bunkers to power its engines. Ships use mainly three types of marine fuels, which include high sulfur fuel oil, low sulfur fuel oil, and diesel oil.