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In your 2011 Buick Enclave, you need 5.5 quarts of 5W-30 full synthetic motor oil. It's best to change your oil every 7,500 miles or annually, whichever comes first, to enhance your engine's longevity, fuel efficiency, and overall performance. Synthetic oil is superior as it reduces friction, keeps the engine cleaner by preventing debris buildup, and ultimately helps protect essential engine components. Ignoring regular oil changes can lead to engine problems as the oil becomes thinner, abrasive, and gradually wears down vital parts.
The 2011 Buick Enclave requires dexos-approved engine oil for optimal performance. If you can't find dexos-approved oil during an oil change or need to top up, you can use other engine oils that have the API Starburst symbol and are SAE 5W-30. The engine oil capacity for this vehicle is 5.2 liters (or 5.5 US Quarts).