When he was searching for zombies around the Village of Kawayan, Nile managed to find a gas station.
He returned to that part of the village and took some gasoline that was stored inside the gallons.
Nile took a few gallons and let Maximo and Croco carry some. After Croco evolved to the middle stage, the spikes on his back could now be folded just like the blades on his arm.
Nile was planning to use gasoline as a way to create a massive explosion and fire on the zombie pets' path.
Along with his two pets, Nile brought the gallons full of gasoline outside the village. He searches for an ideal spot a thousand meters away from the village to hide the gasoline.
If there's none, Nile would dig some soil to plant the gasoline under it. He doesn't want the gallons of gasoline to get trampled by the hysterical animals and fierce zombie pets, after all.