Fuel consumption is always a big concern for consumers , enterprises released over the years we have been doubts about the fuel consumption figures , although the Ministry of Industry announced a fuel consumption test data, but this year's " 315" CCTV exposure Changchun and Tianjin, two car bodies and testing car prices in collusion together after making a false fuel consumption, everyone on this data also lost trust.

Fuel consumption data released by automobile manufacturers are generally constant fuel consumption , which is the car manufacturers in accordance with national standards for temperature , wind direction, wind speed and other objective environmental requirements , to maintain constant speed of the vehicle , and then through a professional approach to calculate the fuel consumption. Fuel consumption value of this test method is generally derived from the basic driving reach .

Beginning in 2009 , the Ministry issued regulations requiring automobile manufacturers fuel consumption must be confirmed by certified third-party testing organization, with a yellow logo affixed to the car. "Automotive Fuel consumption identity ," There are three standard fuel consumption data : urban , suburban , comprehensive . These three data vary widely, such as there is a 2.0T models , urban fuel consumption is 13.2L/100km, suburb is 8L/100km, comprehensive public situation is 9.9L/100km. This identification method is still a little reference value , but there are issues of fraud in the actual test , the same as for the same vehicle inspection , such as the kind of car failed the test , then the correlation coefficient can be handed over to the depot engineers testing organizations , according to their fuel consumption values ​​calculated from the depot want to achieve the ideal set of test parameters like cars , as well as the depot will change narrower tires and so on. This exposed the loopholes in government regulation , it is necessary to strengthen the supervision of the test bodies.

The media selected 30 models are sold in China and the U.S. model , the measured fuel the U.S. Environmental Protection Agency (EPA) published the models in China announced the official fuel consumption were compared. Among 30 models , all models in China 's official combined fuel consumption should be lower than in the U.S. EPA published a comprehensive fuel consumption, fuel consumption is the biggest difference was more than 27% , such as a 2.0T sedan, Chinese oil consumption is 6.6 liters , U.S. oil consumption is 9.1 l , the maximum difference , the difference models generally have a smaller difference of about 5% .

Vehicle fuel consumption data released by the Ministry currently is based on the national standard GB / T 19233-2008 " light vehicle fuel consumption test method" , 20-30 degrees Celsius in the laboratory , through a cold machine starts , acceleration, steady speed , deceleration and idle test , completed four urban cycle cycle cycle and a suburb conditions , fuel consumption data obtained . Ministry of fuel consumption test is too simple , time is short, the test speed is also relatively simple.

Domestic use of basic reference standard working conditions in Europe , with the actual use of domestic vary widely. Simulate conditions in Europe , 31% city driving , suburban driving accounted for 69 %, but nearly 70% of China's urban driving , suburban driving only 30% , which makes real fuel oil consumption was significantly higher than the Ministry of identity . U.S. EPA fuel detection is more comprehensive, including urban traffic , high-speed road ordinary driving style , high-speed road intense driving style , air travel traffic, road conditions and other cold- car driving , is said to condition the model from New York City to work on the road. EPA 's speed is not constant test conditions simulated , but mostly for speed driving. Our test is 780 seconds urban road , suburban road 400 seconds . EPA testing is 1874 seconds city traffic , high-speed road ordinary driving style 765 seconds , the high-speed road intense driving style 596 seconds , 596 seconds conditioned road driving , cold car driving road 1874 seconds . Therefore, according to China 's national conditions should improve fuel consumption test model , to be closer to the real situation .