A fuel-efficient car of a certain brand is priced at 270,000 yuan, while another is priced at 170,000 yuan  According to the current gasoline price and the test data of the fuel consumption per 100 kilometers of the two cars, people who buy this fuel-efficient car need to complete 300,000 kilometers to make up the price difference higher than that of buying a normal car
Arguments that use unproven assumptions as arguments
 If the oil price rises in the future, the mileage required to make up the purchase price of the car will also increase accordingly