There is nothing special about a cargo that makes a truck use a different fuel source. If you have a truck that runs on hydrogen, or a truck that runs on sunlight, or a truck that runs on propane, you can carry "chemical toxins" with either or none of them. Most trucks run on diesel fuel, (which can be just about any oil, but usually is made from crude oil), and so that is the "answer" to your question.
Mostly chemical energy from the fuel.
If there is fuel in the tank then it has chemical energy in that fuel. If it is moving it has kinetic energy. If it is at the top of a hill then it has gravitational potential energy.
A fuel truck....
where is the fuel pump in a 1987 Mitsubishi Truck
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The fuel pump on a 1997 Ram truck with a gasoline engine is inside the fuel tank.
truck gas flooding
It is not recommended for a fuel truck driver to backup a truck with fuel in it, as it increases the risk of accidents, spills, and potential hazards. Drivers should avoid backing up whenever possible and should always follow safety guidelines to prevent any potential dangers.
where i the fuse for a fuel pump on 1991 gmc truck
Minivan. above the fuel tank.Diesel, left side of the block.Gas truck, in the fuel tank.Car, in the fuel tank.Minivan. above the fuel tank.Diesel, left side of the block.Gas truck, in the fuel tank.Car, in the fuel tank.
IT is in the fuel tank. IT is in the fuel tank.
fuel tank