A great big gas tanker truck, these vehicles are monsters in Scrap Metal with 360-degree flamethrowers on top.
Semi Slapshot, the boss of Coal Harbor, drives one of these. During the battle with him, you can't actually damage his tanker truck. Instead you have to blast his minions and use the power-up weapons they drop to blow him away.
In the Gas Wars game mode, you drive one of these and use the flamethrower to smash hordes of Mad-Max style trucks and buggies.