If we look at large 4-engine piston transports, rather large quanties of avgas were required, for long range flights.
The first long ranger was, of course, the Stratocruiser, with 7800 gallons, or so.
The largest capacity amongst civil designs was the 1649 Constellation, with 9800 gallons.
I had the opportunity of flying both types as a First Officer.
With both types, oil quantity was VERY important.
Each had a center oil tank/pump installation, which enabled center tank oil to top up each engine oil tank, in flight.
All done by the Flight Engineer...which enabled the pilots to not be interrupted reading the newspaper.
Done by the navigator, of course.
All we did in the front seats was point it in the right direction...and, of course, takeoff and land once in awhile.
Both types were capable of cruising quite high...low to mid twenties, altho the Stratocruiser could go higher as it had (in addition to engine superchargers) turbo chargers as well.
A very advanced airplane for its time.
[Edited 2006-07-11 07:51:16]