A free app for Android, by Racing Life _ Car Games.

Offroad Oil Tanker Truck Games is a simulation game in which the main objective is to drive an oil tanker truck from a gas station to another station. There are various levels in this game. In each level, you have to complete a mission by driving and transporting your cargo. 

To complete the mission, you need to deliver the cargo to the destination in a specified amount of time. You will be able to earn more money by delivering more cargo. 

The level of difficulty increases as you go from one station to another. You will need to drive on different terrain and perform different tasks.