Staff Answer
Jul 31, 2026 - 01:43 PM
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Approved Fluids & Lubricants: Always use full synthetic engine oils matching the exact viscosity grade (such as 0W-20) and factory-certified coolant mixtures outlined in the technical specifications section of the handbook.
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Fuel Quality Guidelines: Fill the fuel tank exclusively with clean unleaded gasoline rated at the recommended octane level, avoiding prohibited methanol blends or unauthorized metallic fuel additives.
How to Fix It
If the engine exhibits rough idling or knocking after a recent fill-up, check your fuel receipts to ensure compliant unleaded fuel was used, and consult an authorized service center if fuel contamination is suspected.
Find detailed guides in the https://www.autouserguide.com/hyundai...
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