The main culprit of automatic transmission fuel consumption is the loss of capacity caused by the torque converter In the early days, the shift logic chaos due to a predetermined level and fuel consumption was increased. However, with the development of technology, the shift logic is basically no problem, and the torque converter is the culprit of fuel consumption. With the advent of dual-clutch transmissions and cvt gearboxes using steel belts, manual transmissions do not have much advantage in terms of fuel consumption.