When exploring the cost of changing oil for the Cat excavator, it is first necessary to make clear the brand of the oil, the model and the specific model of the excavator.The requirements for oil for Cat excavators of different specifications vary, for example, between Cat 320D and Cat 745C, and there is also a marked difference between the recommended high-quality oil at the original plant and the average oil price on the market.In general, for a medium Cat excavator, a full replacement oil volume is between 20 and 30 gallons.Assuming that high-quality machine oil certified by the original Cat plant is used, the price per gallon is approximately $50-$80 (based on market price fluctuations).So, the oil alone cost about $1,000-$2400.Combined with labour costs and other possible replacements of spare parts (e.g. machine filters), the total cost would be higher than the base oil cost.Therefore, when you consider the question of `How much gas is the Cat', it is important to obtain an accurate offer in conjunction with the actual needs of the professional maintenance service provider.At the same time, periodic maintenance of oil and oil not only ensures good operational condition of excavators, but also effectively prolongs the life of equipment and reduces long-term maintenance costs.In general, with regard to oil replacement services for Cat excavators, prices are affected by multiple factors, suggesting that users consult in detail and select reputable service providers to obtain best value for money options.