Hyundai Sonata N Line 2025 Fuel Requirements

Fuel requirements may vary by market, engine and model year. Always follow the owner's manual, fuel-door label or manufacturer instructions where available.

Verified engines and markets

Manufacturer verified

Hyundai Sonata N Line 2025

DN8

Regular Fuel Accepted

Minimum87 AKI

Recommended87 AKI

Market: United States
Engine: Smartstream G2.5 T-GDi turbo I4
Powertrain: Internal combustion
Fuel type: Gasoline
Ethanol: E15
Fuel tank: 60 L

Source & Verification

2025 Hyundai Sonata Digital Owner's Manual (DN8)

Page: Fuel requirements
Last verified: 2026-10-06

The U.S. manual specifies 87 AKI (91 RON) or higher for the 2.5T as well as a 60 L tank and a maximum E15 blend.

What happens if I use a lower octane fuel?

Do not use a grade below the stated minimum. A higher number is not automatically better unless the manufacturer says so.

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