Abstract: A method for using biodiesel fuel in compression ignition internal combustion engines is described, the biodiesel fuel being present in a light oil diesel-biodiesel blend with a percentage of biodiesel greater than 7%, in which this percentage of biodiesel higher than 7% causes an increase in the viscosity of the mixture, the increase in viscosity negatively affecting the cold start of the engine; the method reduces the biodiesel concentration to below 7% in the starting phase of the engine, the reduction in concentration being achieved by adding light oil diesel to the light oil diesel-biodiesel blend.

Abstract: A method for using biodiesel fuel in compression ignition internal combustion engines is described, the biodiesel fuel being present in a light oil diesel-biodiesel blend with a percentage of biodiesel greater than 7%, in which this percentage of biodiesel higher than 7% causes an increase in the viscosity of the mixture, the increase in viscosity negatively affecting the cold start of the engine; the method reduces the biodiesel concentration to below 7% in the starting phase of the engine, the reduction in concentration being achieved by adding light oil diesel to the light oil diesel-biodiesel blend.