Fuel consumption for the Cat390 excavator as a heavy engineering machine is one of the main concerns of many users.The fuel consumption of the Caterpillar 390 excavator is influenced by a number of factors, including the operational environment, load levels, modus operandi, etc.In general, the average fuel consumption per hour under standard operating conditions may be between 25 and 35 litres, and conversion to tons is calculated on the basis of diesel density (normally, diesel density is approximately 0.84 tons/m3).In order to assess accurately the fuel economy of the Cat 390 excavator, it is recommended that the official data on fuel consumption under the general conditions be consulted and analysed in conjunction with actual usage.At the same time, reasonable maintenance and standard operating practices can effectively reduce fuel consumption and improve efficiency of equipment.Overall, the exact amount of fuel consumed by the Cat390 excavator requires specific analysis, taking into account the performance parameters of the equipment itself and a combination of actual operating conditions.Knowing and mastering the oil-consuming characteristics of users who are interested in purchasing or already owning Cat 390 excavators will undoubtedly better control operating costs and enhance economic efficiency.