Eight quarts of engine oil are required for a full drain-and-fill on the 2020 Suburban’s 5.3-liter V8, typically with a new oil filter. The recommended oil is Dexos1 Gen 2, usually 0W-20 synthetic, though you should verify the exact specification in your owner's manual for climate-specific guidance.
Oil capacity for the 2020 Suburban 5.3L V8
The official capacity with a new filter is listed by GM as eight quarts (7.6 liters).
- 8 quarts (7.6 L) of engine oil with a new filter.
In practice, plan for about eight quarts when performing a full change with a new filter to reach the recommended capacity.
Oil specification and viscosity
Chevrolet specifies a Dexos1 Gen 2 oil, with a common viscosity recommendation of 0W-20 for the 5.3L V8 in most regions. Synthetic oil is preferred for protection and efficiency, though your manual will confirm exact requirements for your climate and driving conditions.
- Dexos1 Gen 2 compliant oil, 0W-20 viscosity; full synthetic is preferred.
Always verify the exact viscosity and specification in your owner's manual or with a Chevrolet dealer, as regional guidelines can vary.
How to check and maintain the right oil level
After changing the oil, or during regular maintenance, follow these steps to ensure the level is correct and the engine is properly lubricated.
- Park on level ground, engine off, and let the oil settle for several minutes after turning off the engine.
- Remove the dipstick, wipe it clean, reinsert fully, then pull it out again to check the level. The oil should fall between the min and max marks.
- If the level is low, add oil gradually in small increments (about 1/2 quart at a time) and recheck with the dipstick to avoid overfilling.
- After adding, run the engine for a few minutes, turn it off, wait a few minutes, and recheck the level to confirm it’s within spec.
Concluding note: Regularly checking the dipstick after a change helps ensure you maintain the correct oil level and protect the engine over time.
Post-change reminders
Always install a new oil filter when changing the oil, use proper tools and a reliable drain pan, and recycle used oil according to local regulations. Keep records of the service for maintenance scheduling.
Summary
For the 2020 Chevy Suburban with the 5.3 L V8, the oil capacity for a full change with a new filter is eight quarts (7.6 L). The recommended oil is Dexos1 Gen 2 with a 0W-20 viscosity, and synthetic oil is preferred. Always consult the owner's manual for climate-specific recommendations and confirm the exact specification with a dealer if you have any doubt. Properly measuring and maintaining the oil level is essential for engine longevity.