How does a CVT improve fuel efficiency compared to conventional automatic transmissions?

A continuously variable transmission (CVT) improves fuel efficiency primarily by providing seamless shifting without distinct gear steps. Unlike conventional automatic transmissions that operate with set gear ratios, a CVT can adjust its ratio continuously. This allows the engine to operate at its most efficient RPM for a wider range of speeds and driving conditions, which enhances fuel economy by optimizing the engine's performance.

The absence of distinct gear steps means that the transmission can fine-tune the power delivery based on driver demand and road conditions. This results in a smoother driving experience and better fuel efficiency, as the engine doesn't have to work as hard to maintain optimal performance. This continuous adjustment capability is what sets CVTs apart from traditional transmissions, making them particularly effective in improving fuel efficiency.

Other choices, while potentially relevant to transmission function, do not address how CVTs uniquely achieve improved fuel efficiency in the same way that seamless shifting does.