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The 2006 GMC Envoy 4.2l's oil capacity is 7 quarts of synthetic SAE 5w30 motor oil. It's suggested to change the oil every 7,500 miles or once a year, whichever comes first. Regular oil changes can extend your engine's lifespan, improve gas mileage, and enhance performance. Routine maintenance like oil and filter changes helps eliminate engine debris and sludge. Neglecting oil changes can lead to engine issues as the oil deteriorates over time, becoming less effective and causing unnecessary wear on critical engine components. Synthetic oil is highly recommended for better engine performance, offering superior protection with lower friction levels.
The 2006 GMC Envoy 4.2L requires 7 quarts of synthetic motor oil to reach its oil capacity.
Six quarts
I am unsure and don't have any information.