The idea of using emulsified fuel has been around for decades, and a recent trial has again demonstrated that efficiency gains are possible alongside the known emission reductions, writes Wendy Laursen

A chief engineer records in-cylinder pressures while under load running on fuel oil emulsion.

A chief engineer records in-cylinder pressures while under load running on fuel oil emulsion.

An Australasian ferry operator has recently trialled the use of emulsified fuel and hired an independent scientist to verify the results. The conclusion: fuel savings of 5% at high loads and significant reductions in NOx and particulate emissions, says Leigh Ramsey, director of Blended Fuel Solutions New Zealand. The results are in keeping with research that goes back decades, where a range of universities and companies have reported reductions in fuel consumption of 1% to 8%.