The 2004 Buick Lesabre came standard with a 3.8-liter V6 engine for both Custom and Limited models. The motor oil capacity for your full-size sedan is 4.5 quarts with the filter and Buick suggests that you change your vehicle’s oil every 7,500 miles to keep your engine running as smoothly as possible. But don’t forget to reference your Buick Owner’s Manual to ensure you’re following the correct maintenance schedule for your Lesabre.
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