The 2020 GMC Sierra 6.2L V8 calls for Dexos1 Gen 2 certified full-synthetic motor oil with a viscosity of 0W-20, and about 8 quarts of oil are needed for a typical change (including the filter). This article outlines the official specification, capacity, and maintenance guidance for this engine.
Oil specification and capacity
Recommended oil and viscosity
According to the manufacturer’s guidance for the 6.2L EcoTec3 V8, use Dexos1 Gen 2 certified full-synthetic motor oil with a viscosity of 0W-20 for normal operating conditions.
- Oil type: Dexos1 Gen 2 certified full-synthetic motor oil
- Viscosity: 0W-20
- Capacity: 8 quarts (with filter)
- Filter: GM OE filter or equivalent high-quality filter
For a standard oil-change procedure, plan to replace about 8 quarts of Dexos1 Gen 2 0W-20 oil and install a new filter.
Maintenance guidance and change intervals
Oil change intervals
Maintenance intervals are driven by GM’s oil life monitoring system. While typical driving may result in oil-change intervals around 7,500 miles, severe driving conditions can shorten this interval. Always follow the vehicle’s oil-life monitor for the exact timing.
- Oil-life monitor: follow the GM oil life system to determine when to change oil
- Typical interval: about 7,500 miles under normal driving; shorter under severe conditions
- Warranty and quality control: using Dexos1 Gen 2 0W-20 helps ensure warranty compliance
Bottom line: use Dexos1 Gen 2 0W-20 and adhere to the vehicle’s oil-life monitor to schedule changes.
Summary
For the 2020 GMC Sierra 6.2L V8, the recommended oil is Dexos1 Gen 2 certified 0W-20 full-synthetic, with a total capacity of about 8 quarts per change (including the filter). Use a GM OE filter and rely on the GM oil-life monitor to determine when to change oil. Following these specifications helps protect the engine, maintain performance, and support warranty terms.