New Testing Process for Fuel Economy

Procedural errors at Hyundai’s testing operations in Korea led to incorrect fuel economy ratings for select vehicle lines.

The MPG rating discrepancies resulted from procedural errors during a process called “coastdown” testing. Countdown testing measures a vehicle’s aerodynamic drag, tire rolling resistance and drivetrain frictional losses, and provides the technical data used to program the dynamometers that generate EPA fuel economy ratings.

For more information on coast-down testing, please click here.