How much more fuel-efficient is the 737 MAX compared to the 737-800?

The 737 MAX series has made significant advancements in fuel efficiency compared to its predecessor, the 737-800. These advancements are primarily due to the incorporation of more modern engines, specifically the LEAP-1B engines, which are designed to provide a substantial reduction in fuel consumption. This improvement is around 14% to 15% better than the 737-800, allowing operators to achieve greater fuel savings over long-haul flights.

The figure of 12% is a commonly cited average for various configurations and operational conditions, summarizing the overall benefits while accounting for variations such as flight patterns, weight, and environmental factors. By understanding the engineering improvements and operational efficiencies of the 737 MAX series, we can appreciate how the aircraft achieves its enhanced status within the range of modern commercial jets.