[kjam22]

One more time for the record... many if not most tanker trucks have pumps that will allow them to draw a vacume on the tank. So that the truck can "suck" fluids into them.

Secondly.. a truck full of fumes is more LIKELY to explode, but a truck full of liquid will make a LOT bigger bang IF it explodes.

[Fierce Allegiance]

you can suck vacuum all day if you want, but unless there is a pipe into the liquid in the tank, you ain't getting nothing the way the hoses attach to the tanks. Delivery trucks for gas stations almost never have vacuum equipment. I just checked the 4 gas delivery trucks in the yard next door and they do not have any vacuum equipment.

A truck full of gasoline will not even explode unless you agitate the fuel into air and a confined chamber to allow pressure to develop, so the partially full is more explosive than a full truck, but you will get a lot longer burn time with a full truck.