Modernizing the Fuel Economy Testing Process

Fuel economy is measured under controlled conditions in a laboratory, using a set of tests that are set forth in regulations issued by the U.S. Environmental Protection Agency (EPA). The test results are used for two purposes: (1) to establish compliance with the fuel economy and greenhouse gas (GHG) emission program; and (2) when combined with additional test results, to provide the estimated fuel economy rating for each vehicle. These ratings are applied to vehicle window stickers and are published on the government-sponsored website

Hyundai’s process for testing the fuel economy of our vehicles was—and is—consistent with government regulations and guidance, which have always afforded broad latitude to vehicle manufacturers in determining test conditions. As a result of this inexact guidance, vehicle manufacturer test results as a whole are imprecise, inconsistent and not repeatable, as noted by consumer advocates ranging from Consumer Reports to the Union of Concerned Scientists.

In fact, over the past 30 years, the EPA has acknowledged the variability of their tests and more recently expressed a desire to update them.

Hyundai is committed to partnering with the government to innovate fuel economy testing procedures to achieve more accurate and reliable “real-world” results for consumers.