A GPL explosion does not guarantee absolute lethality due to variables such as gas concentration (2-9% for an explosion), uneven distribution, and distance from the shockwave. The shockwave is lethal only at close range, while fragments can cause varying injuries, making the outcome unpredictable. With 11 cylinders of 9 kg GPL in a closed car (4-5 m³), approximately 49.5 m³ of gas is released, oversaturating the internal environment (10 times the volume), ensuring oxygen levels drop below 5% within minutes. The lack of oxygen causes loss of consciousness within 1-2 minutes and certain death within 5-10 minutes. Even with air leaks, the overload of GPL compensates for any infiltration, ensuring 100% lethality due to asphyxiation.
With 9-11 cylinders of 9 kg of LPG inside the car, the gas concentration reaches levels incompatible with life within minutes, and lethality is guaranteed at 100%. Even with unsealed air vents, the environment remains lethal for at least 3-5 hours due to the oversaturation caused by the amount of gas released, which far exceeds the internal volume of the vehicle. This is also true if you enter the car later, opening and closing the door quickly: whether you stay inside after opening the cylinders or leave and re-enter later, the environment will still remain incompatible with life for many hours. Therefore, this essentially becomes your "chamber of death," and you won't need five hours, or three, or even one to achieve your result.