The petroleum products sold by the gas station have features in the distribution process that they are not sold with regular shapes like common industrial products, and that consumers generally purchase petroleum products without any immediate confirmation for their qualities, quantities, functions etc. One of the problems in running the gas station is that a part of the gas stations sells petroleum products with fake oils and irregular quantity, which leads economic losses to the consumers which purchased them. In addition, it is practically considerably difficult to uncover and accuse any illegal sales of petroleum products such as fake oils, irregular quantity etc. in advance. Therefore, there are certainly various limits to which petroleum products such as fake oils, irregular quantity etc. should not be sold to the consumers. Besides, the relief for damage is actually impossible or placed in a difficult situation, because the damage is a small sum, and because it is not easy for consumers to prove damages incurred to them who have actually purchased petroleum products with fake oils, irregular quantity sold by the gas station. Taking all these considerations into account, the study is focused mainly on the consumers who have purchased petroleum products sold by the gas station. Concretely, the purpose of the study is to grasp any relief ways on consumer damages which caused owing to purchasing the petroleum products sold by the gas station, as well as to figure out problems in terms of its running system, and to suggest solutions for them.