When I was carrying buckets of diesel up the stairs, I did notice that it was a lot lighter than water. Still not great after 17 flights, but a lot lighter than a bucket full of water.
According to omniscient Wikipedia, diesel is 83% the density of water, so the 33 feet that water can be lifted via suction becomes ~38'.
The Trieste used the buoyancy of (incompressible) gasoline to enable a return trip from the bottom of the Mariana Trench.
Strong work lifting all that fuel!