See also:

Coolant
The coolant should be changed at the intervals specified in the maintenance schedule. ...

40 MPG POWERTRAIN
Under the hood, the Hyundai Elantra is powered by an all-new 1.8-liter Nu four-cylinder engine with 148 horsepower and 131 lb-ft of torque (145 horsepower and 130 lb-ft of torque for Elantra PZEV) ...

Coolant
The coolant should be changed at the intervals specified in the maintenance schedule. ...