Fuel cans, oxygen tanks, and propane tanks can be shot to unleash massive devastation on the infected. But they can also be picked up (press the use button) and carried, allowing your team to place them in strategic positions.
While carrying one of these objects you can’t fire your weapons. However, you can perform a melee attack with them, enough to knock infected back until you can drop the item and retaliate with a more deadly attack.
Fuel Can
These red cans are quite common and are filled with a flammable liquid. Shoot them to create a large wall of fire.
Given the larger volume of the container, fires created by fuel cans are spread over a larger area than those created by molotov cocktails.
They’re best employed in defensive situations when you can hand-place each fuel can in certain strategic areas. But they won’t ignite until shot, so don’t forget to blast them during the chaos of a finale.
The fire created by these cans can wipe out dozens of infected, including bosses.
Oxygen Tank
These green cylindrical tanks contain pressurized oxygen and can usually be found at hospitals or inside ambulances. When shot, a tank emits a hissing sound for a few seconds and then violently explodes, liquefying any infected within its large blast radius.
The delay can make it tough to time their detonation, so they’re best tossed into high-concentration areas where the infected have restricted movement, such as doorways or small rooms.
Propane Tank
Propane tanks are quite common and found in locations ranging from industrial facilities to residential backyards.
Unlike the oxygen tank, propane tanks explode immediately when shot, making them far more predictable and useful during defensive situations.
Scatter these tanks around major choke points prior to a finale and target them as swarms of infected rush past. The blast radius is similar to that of an oxygen tank, instantly killing all nearby common infected.
These can also be used effectively against Tanks and Witches. Have one teammate toss a propane tank at the infected boss while another shoots it. Just make sure you’re a safe distance away when it explodes.