Light Cycle Oil LCO is a diesel boiling range product from fluid catalytic cracking units flexible process to process LCO into desired products such as verylow sulphur diesel and high octane higharomatics naphtha It is a light lubricating oil that is suitable for use on bicycles and similar equipment It is a diesel boiling range product from fluid catalytic cracking units Light cycle oil is a poor diesel fuel blending component LCO are produced at the bottom of the fluidized catalytic cracking FCC process in a refinery and are enriched with 5080 wt heterocyclic aromatic compounds 3 wt S and 600 ppm N