Abstract
In 2016, the unlawful practice relating to automobile fuel efficiency levels by domestic manufacturers came to light；a major incident that led to the reorganization of the automobile industry. While such practices should not be ignored, I think that part of the problem is related to the ease with which the present fuel efficiency measurement system allows for fraudulent activities to occur. As a consumer it is a problem whether their vehicle runs or not, but this matter is diverging from that. It has been recognized for a long time that actual fuel efficiency levels are lower than figures stated in print. Therefore, even if the fuel efficiency standards undergo a change, the problem cannot be expected to be resolved sufficiently. There is great meaning in conducting an experiment based on actual running conditions that takes into account relevant noise factors.
Therefore, using past research on automobile fuel efficiency which utilizing quality engineering as a reference, I conducted a multiple-vehicle comparative experiment on fuel efficiency. In addition to simply comparing performance between models, I also evaluated the degree to which vehicle efficiency levels matched those values stated in print.
