See also:

Efficiency & Drivability
Automakers have been racing to produce small cars that get great gas mileage using conventional engines, and Hyundai has succeeded on that front with the 2011 Elantra, which is powered by a new 14 ...

Automatic transaxle fluid (if equipped)
Automatic transaxle fluid should not be checked under normal usage conditions. But in severe conditions, the fluid should be changed at an authorized HYUNDAI dealer in accordance to the scheduled ...

Check Spark Plugs and Ignition System
Inspect your spark plugs and replace them if necessary. Also check all ignition wiring and components to be sure they are not cracked, worn or damaged in any way. ...