[ForOldHack]

Do you have an idea what one bbl of crude oil weights? Like bowling balls, it depends on the quality of the crude. 55gal @ 8.5lbs/gal to 11.4lbs/gal? 450lbs to 625lbs. Forklifts only.

[Symbiote]

A standard (now) actual chemical drum holds 200L, which would be 200kg plus the weight of the barrel if filled with water. Oil is less dense.

Estimations are much easier with metric units.

There are special hand-powered machines for moving chemical drums: https://www.salesbridges.eu/en/products/drums-lifter/