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The new regulations for emissions in USA (California and other States), introduce a new quality requirement for diesel formulations. As an answer to these problems Intevep, S. A., has developed a hydrocracking processing technology, a very flexible process able to operate up to 100 % of cracked material and with a mixture of light to heavy gas oil in any proportion, and which operates at moderate pressure. The proper balance between hydrogenation and mildhydrocracking is obtained through controlling the temperature and by tayloring the catalyst composition. Production of diesel fuel with less than 10 % wt aromatics was targeted, in a scenario of minimum hydrogen availability. Very low sulfur levels are achieved and the aromatic fraction is composed mostly of mono-aromatic compounds. Tests were conducted using a commercial Isuzu diesel engine, installed on an engine test bench and operated on a 7-mode cycle.