See also:

Use of MTBE
HYUNDAI recommends avoiding fuels containing MTBE (Methyl Tertiary Butyl Ether) over 15.0% vol. (Oxygen Content 2.7% weight) in your vehicle. Fuel containing MTBE over 15.0% vol. (Oxygen Content 2. ...

SUPPLE RIDE, AGILE HANDLING
An advanced four-wheel independent suspension system combines a supple ride with precise handling and steering response for Hyundai Sonata GLS and Limited models. Sonata uses MacPherson strut fron ...

Fuel requirements
Your new vehicle is designed to use only unleaded fuel having a pump octane number ((R+M)/2) of 87 (Research Octane Number 91) or higher. Your new vehicle is designed to obtain maximum performance ...