According to Sigaus data, the oil was collected from 6,292 establishments across 142 municipalities in the Madrid region. Following treatment, approximately 6,000 tons of new lubricants and over 3,000 tons of industrial fuel were produced.
The company estimates that producing these same resources through conventional methods would have required about 3.1 million barrels of oil. Used industrial oil, considered hazardous waste due to its polluting potential, is used to lubricate engines and machinery but degrades and can contain toxic substances.
Of the total collected in Madrid, 6% consisted of impurities like water and sediment. After removing these, 12,757 net tons of used oil were processed. Of this, 73% (9,337 tons) were allocated for regeneration into new lubricant bases, returning 5,845 tons to the market, enough to fill the oil sumps of approximately 1.4 million passenger cars.
The remainder, 3,078 tons, was transformed into BIA fuel, a low-sulfur industrial combustible used mainly in furnaces and boilers. This process also prevented the emission of 8,102 tons of carbon dioxide by requiring less energy than producing lubricants and fuels from petroleum.
Sigaus carried out a total of 20,388 collection operations in the Community of Madrid during 2025, including areas near protected spaces such as the Biosphere Reserve of the Upper Basins of the Manzanares, Lozoya, and Guadarrama rivers.
