Fuel Requirements; Petrol Engine - Hyundai SX2 Owner's Manual

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Fuel requirements

Petrol engine

Unleaded
For the optimal vehicle performance, we recommend you use unleaded petrol which has
an octane rating of RON (Research Octane Number) 95/AKI (Anti Knock Index) 91 or
higher.
You may use unleaded petrol with an octane rating of RON 91 - 94/AKI 87 - 90 but it may
result in slight performance reduction of the vehicle. (Do not use methanol blended fuels)
Your new vehicle is designed to obtain maximum performance with UNLEADED FUEL, as
well as minimise exhaust emissions and spark plug fouling.
NOTICE
Never use leaded fuel.
The use of leaded fuel is detrimental to the catalytic converter and may damage the
engine control system's oxygen sensor and affect emission control.
Also, severe wear and crack of piston ring, valve, etc. may occur and knocking noise may
be heard from your engine.
Leaded
if equipped
For some countries, your vehicle is designed to use leaded petrol. When you are going to
use leaded petrol, we recommend that you contact a HYUNDAI authorised repairer.
Octane rating of leaded petrol is same with unleaded one.
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