What is the fuel consumption difference between automatic and manual transmission for the same car?

[HarmonyFitz]

It depends on the specific car model. Generally, an automatic transmission consumes about 1L/100km more than a manual transmission. For dual-clutch transmission models, automatics can actually be 0.2L/100km more fuel-efficient than manuals. With CVT transmissions, automatics tend to be more economical. 1. In practical use: The transmission constantly shifts gears. The mechanical lock-up mechanism only engages during steady-state driving in top gear, remaining inactive most of the time. This means power is primarily transmitted through the torque converter (which involves some slippage), resulting in significant power loss - at least 10%. 2. Structure: Automatic transmissions have complex designs with numerous precision oil passages. As mileage increases, their performance degrades rapidly, with power transmission losses exceeding 20%. Additionally, shift smoothness deteriorates noticeably, and gear changes become more jarring.