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Deconstructing the Boeing 747's Fuel Efficiency: An In-Depth Analysis

The Boeing 747 is often cited as getting only 0.2 miles per gallon, consuming roughly five gallons of fuel for every mile flown. However, this simple metric is misleading without considering the aircraft's passenger capacity. A more accurate measure is passenger-miles per gallon (pax-MPG), which for a fully loaded 747-400 is approximately 104. This efficiency is comparable to a modern car carrying two passengers. While iconic, the four-engine jumbo jet's fuel burn is notably higher than that of modern, more efficient twin-engine widebodies like the Airbus A350 and Boeing 787.

Official Source: https://simpleflying.com/miles-per-gallon-boeing-747-analysis/