Looking at Maximum Take off-weight it appears that a 747 has almost double the MTOW of a 767. https://en.wikipedia.org/wiki/List_of_airliners_by_maximum_takeof

Looking at Maximum Take off-weight it appears that a 747 has almost double the MTOW of a 767. https://en.wikipedia.org/wiki/List_of_airliners_by_maximum_takeoff_weight https://en.wikipedia.org/wiki/List_of_airliners_by_maximum_t... I can imagine this being the case mainly because the calculation is assuming 1 engine failed. Given this, and assuming an almost maximum payload, would there necessarily be scenarios here for the 747 to be more fuel efficient?