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The use of reasonable standards for the technical operation of motor vehicles is the key to improving the efficiency of the transport process. Due to the fact that a number of standards for the technical operation of vehicles have not been updated for many years, an urgent problem is the improvement of methods for rationing the technological parameters of the technical operation of vehicles. The purpose of the study is: improving the efficiency of the operation of motor vehicles based on the development and implementation of a methodology for adjusting the frequency of maintenance by the amount of actual fuel consumption. The approach proposed by the authors is based on the hypothesis that the work performed by the nodes and aggregates of vehicles is equivalent to the total fuel consumption. Therefore, the use of this parameter as an argument for the function of determining the frequency of preventive actions allows us to more fully take into account the operating conditions of vehicles, the nature of the transport work performed, technical, resource and design features. Methods of mathematical analysis and statistical processing of the results of field surveys were used to develop a methodology for adjusting the frequency of preventive effects by the amount of total fuel consumption. As a result of the work done: a new methodological approach to the appointment of the frequency of preventive actions by the amount of total fuel consumption is proposed; a methodology for adjusting the basic norms of the frequency of maintenance of motor vehicles based on data on actual fuel consumption is developed, which allows to establish the values of total fuel consumption that determine the need for preventive maintenance. The scientific novelty of the work is: – methodical approach to the appointment of the frequency of preventive actions by the amount of total fuel consumption; – methodology for determining the values of total fuel consumption, determining the need to perform preventive actions; – the values of the coefficient of reduction of fuel consumption when driving on a standard driving cycle to the conditions of traffic on the highway, defined for different categories of vehicles and necessary for the practical application of the developed methodology. The practical significance of the results of the study is determined by a new approach to the appointment of the frequency of maintenance, which allows more fully to take into account the actual operational factors affecting the resource characteristics of vehicles. Based on the results of practical application of the developed methodology, it was found that when operating KAVZ-4235 buses in the city, the frequency of TO-2 can be increased by 30%, and outside the suburban area by 45%. Based on the data obtained, recommendations have been developed for the practical application of the presented methods for correcting the regulatory periodicity of the total fuel consumption. Forecast calculations of the frequency of technical services of the categories of vehicles under consideration have been performed.