Abstract: The current method SH/T 0175 is not suitable for fast and simple evaluation of diesel fuel oxidation stability due to complex operation and long test period. A new fast way for the diesel oil oxidative stability is suggested based on the rotating oxygen bomb. The factors affecting repeatability and distinguishability are studied through single factor analysis and orthogonal experiments. The optional experiment conditions are screened out: 100 ℃, 800 kPa of oxygen pressure, 5 mL water, 40 g sample and 3.0m copper wire. The mathematical model to predict the total insolubles of diesel using the data of oxidation induction period and oxidation termination time are established. This method can be used to evaluate the oxidation stability of diesel fuel.

Key words: diesel oil, oxidation stability, rotary oxygen bomb, oxidation induction period, oxidation termination time