The task of improving the efficiency of a motor vehicle during operation in cold climates is reduced to the task of ensuring integrated optimization of the main engine values and parameters with an unconditional assessment of ICE fuel quality. The task of ICE integrated optimization includes: justification of the choice of the main ICE values, based on the objectives and optimal solution of the tasks of efficient vehicle operation; assessment of the technology level of fuel and determination of its optimal composition; determination of the optimal parameters for the elements of ICE subsystems. Based on the proposed method for level optimization of ICE parameters when using fuels of different quality, an automated diesel fuel quality control system for vehicles used in regions with cold climates in the form of software was developed. © 2021 Elsevier B.V. All rights reserved.