> Refueling is not allowed in Formula 1, it has only been allowed during two brief stints in the early 1980s and late 1990s.
Brief? It was allowed from 1994 to 2009, and the official reason for removing it in 2010 was team expenses (they had to move expensive speed-refueling machinery around the world, and highly trained pit staff to match)
That's not strictly true. Refuelling was allowed (or, more accurately, it wasn't banned) from 1950 (the first F1 world championship) thru 1983. Fangio did a deliberate pitstop during his famous win at the Nürburgring in 1957 [1].
However, it appears that it wasn't until 1983 that a team (Brabham) deliberately built a car with a tank too small to hold enough fuel to finish a race [2]. Brabham went on to win the 1983 championship and refuelling was banned from 1984.
Brief? It was allowed from 1994 to 2009, and the official reason for removing it in 2010 was team expenses (they had to move expensive speed-refueling machinery around the world, and highly trained pit staff to match)