40 miles per gallon as long as you drive to keep the ECO light on.
Depends on how you drive it
52.27 miles per gallon
The 2004 Hyundai Sonata has 16 valves.
The 2013 Hyundai Sonata has 16 valves.
The 2012 Hyundai Sonata has 16 valves.
The 2011 Hyundai Sonata has 16 valves.
The 2003 Hyundai Sonata has 16 valves.
The 2006 Hyundai Sonata has 16 valves.
The 2002 Hyundai Sonata has 16 valves.
The 2007 Hyundai Sonata has 16 valves.
The 2010 Hyundai Sonata has 16 valves.
The 2009 Hyundai Sonata has 16 valves.