Vehicle Questions and Answers
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In the 2003 Chevrolet Avalanche 1500, the 5.3L 8-cylinder engine requires a synthetic SAE 5W-30 motor oil and can hold up to 6 quarts with the filter. If you don't experience temperatures below 0ºF, you can opt for 10W-30 oil. Make sure not to exceed 10 pound feet of torque when tightening the oil drain plug. A 5-quart container of Mobil 1's Advanced Synthetic Motor Oil, suitable for your Avalanche, costs about $29 on sale, while a single quart is priced at $5.39 for top-ups. For the correct oil filter, look for a WixBrand 51042, usually priced around $10 at your nearby auto parts stores.
The motor oil recommended for the 2003 Chevrolet Avalanche 1500 is SAE 5W-30.