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All variants of the 2011 Hyundai Elantra are equipped with the same 1.8-liter 4-cylinder engine. This means that regardless of your chosen trim level, you will require the same type and amount of oil. Specifically, you'll need 4.2 quarts of SAE 5W-20 synthetic motor oil. While you could use SAE 5W-30 in an emergency, it's not recommended unless necessary due to differences in oil thickness and viscosity. Thicker oil can increase friction within the engine, leading to premature wear and tear. It's best to stick to the manufacturer's recommended oil with the lower numbers for optimal longevity of your Elantra, even if it means spending a bit more per oil change.
here's a paraphrased and simplified version of the text: "In Spain, they use 5w40 motor oil.
The 2011 Hyundai Elantra requires 4.23 US quarts (4.0 liters) of engine oil. It is recommended to use either SAE 5W-20 or 5W-30 oil for this vehicle.