The 2021 GMC Acadia typically requires about 6 quarts of engine oil with the filter for the 3.6L V6, and around 5 quarts for the 2.0L turbo, depending on the engine configuration. Always verify the exact amount for your specific vehicle in the owner's manual or with a dealer.
Engine options and oil capacity
The Acadia lineup for 2021 includes two common engine configurations. The figures below assume a standard oil change with a filter and use the GM-recommended oil specification.
- 3.6L V6 engine — oil capacity: 6 quarts (including the filter).
- 2.0L turbocharged 4-cylinder — oil capacity: about 5 quarts (including the filter).
Note: Some sources list slight variations (e.g., 5.7–6.0 quarts). Always confirm the exact figure for your vehicle’s engine code and build date.
What oil and viscosity to use
GM generally recommends Dexos1 Gen 2 synthetic oil for the Acadia. The common viscosity is 5W-30, though 0W-30 may be acceptable in certain markets or conditions per the owner's manual. Use the grade specified on the under-hood sticker or in the manual.
How to check and maintain oil level
Park on level ground and wait for the engine to cool before checking the dipstick. Wipe the dipstick, reinsert, then pull it again to read the level. When adding oil, use the correct viscosity and the amount listed for your engine, and avoid overfilling. Replace the oil filter at each change.
Why capacity numbers vary
Different engines and configurations within the 2021 Acadia require different oil capacities. Variations can also arise from filter size, oil pan design, and factory options. Always verify the exact specification for your specific vehicle.
Conclusion
For the 2021 GMC Acadia, expect about 6 quarts of oil for the 3.6L V6 and about 5 quarts for the 2.0L turbo, including the filter. Use Dexos1 Gen 2 synthetic oil, typically 5W-30, and consult the owner's manual or dealer for your exact figure.
Summary
Oil capacity in the 2021 GMC Acadia depends on the engine: roughly 6 quarts for the 3.6L V6 and about 5 quarts for the 2.0L turbo, with the filter included. Always verify with the manual or dealer for your specific configuration.