Boeing's 737 MAX 8 takes over from the 737-800
Boeing's most-produced 737 variant, the 737-800, is being replaced by the MAX 8, which the manufacturer says uses about 20% less fuel and emits roughly 20% less CO2.

Boeing 737 (all variants)Boeing 737 (all variants)
Boeing built 4,991 examples of the 737-800, making it the most-produced variant of the most-produced commercial jet. The MAX 8 is its successor.
Boeing markets the MAX 8 as the versatile member of the 737 MAX family, citing roughly 20% lower fuel use and CO2 emissions than the aircraft it replaces. The two jets overlap on capacity: the MAX 8 seats about 162 to 189 passengers depending on configuration, a band that covers the range airlines used for the 737-800.
That overlap matters for operators. Carriers can move from the older airframe to the newer one without redesigning their networks.
Sources
- simpleflying.comThe Aircraft Replacing The Iconic Boeing 737-800