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Valve clearance
Inspect excessive valve noise and/or engine vibration and adjust if necessary. An authorized HYUNDAI dealer should perform the operation. ...

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. ...

Hyundai Tucson Owner's manual
WARRANTIES FOR YOUR HYUNDAI VEHICLE Please consult your Owner's Handbook & Warranty Information booklet for your vehicle's specific warranty coverage. RESPONSIBILITY FOR MAINTENANCE The ma ...