DETROIT - GM said new tire technologies could result in up to a 7% improvement in fuel economy, according to some estimates.
Hyundai and Kia to Adjust Fuel Economy Ratings for 2011 to 2013-MY Vehicles
ORANGE COUNTY, CA – Hyundai and Kia are adjusting the fuel economy ratings for approximately 900,000, or 35%, of 2011-2013 model-year vehicles sold through Oct. 31, 2012.