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Indian oil refineries have initiated tests of fuel emulsion systems from a Monaco-based company to clean highly polluting bunker fuel as they eye significant benefits, including substantial fuel cost savings and a reduction in environmental impact of the high carbon-emitting fuel used in ships. Two state-owned oil firms deployed Fowe Eco Solutions' (FOWE) patented Cavitech devices at their refinery and depot installations to check the result of emulsified fuel oil (bunker fuel), sources aware of the matter said. Trials showed substantial reduction in emissions and better fuel efficiency, they said, adding the refiners are now looking at tests for its commercial use. Requiring very little initial investment and eliminating the need for installation downtime, the FOWE uses a process known as cavitation using its Cavitech device, which allows emulsification of fuel oil, also known as furnace oil, with fresh water. This process, which does not require any additives or further processing