The 2021 GMC 6.2L V8 requires Dexos1 Gen 2-certified 0W-20 synthetic motor oil.
For context, this engine powers models like the GMC Sierra 1500 and Yukon/Yukon XL. GM specifies Dexos1 Gen 2 with a 0W-20 viscosity as the factory standard to balance cold-start protection, efficiency, and emissions. Always verify the exact specification in your owner’s manual or with a dealer for your exact model and region.
Oil specifications for the 6.2L EcoTec3
GM’s guidance for the 6.2L EcoTec3 engines is to use a Dexos1 Gen 2-certified, full‑synthetic motor oil with a 0W-20 viscosity. This grade is chosen to optimize startup protection, wear resistance, and emissions performance.
Before listing the standard requirements, note that you should always confirm the specification in the owner’s manual for your exact model year and region, as some markets or editions may mention different specs.
Key oil details include:
- Oil type: Dexos1 Gen 2 certified motor oil
- Viscosity: 0W-20 (winter-grade) for a wide temperature range
- Form: Full synthetic motor oil
- Approval: GM Dexos1 Gen 2 validation
Using a non‑ Dexos1 Gen 2 oil or the wrong viscosity can affect performance and warranty coverage, so sticking to Dexos1 Gen 2 with 0W-20 is advisable.
Climate considerations and maintenance notes
In standard driving conditions and climates, 0W-20 Dexos1 Gen 2 provides the recommended balance of lubrication, fuel economy, and emissions control. If you drive in extreme temperatures or follow a heavy-use driving profile, consult your owner's manual or a GM service advisor for any regional guidance.
Before diving into maintenance details, remember to adhere to the GM maintenance schedule and always use a genuine GM oil filter in combination with the Dexos1 Gen 2 oil.
- Follow the GM maintenance schedule or dealer recommendations for oil change intervals
- Always use a genuine OEM (or GM-approved) filter with Dexos1 Gen 2 oil
- Regularly check the oil level and color to catch any issues early
In short, the approved oil for a 2021 GMC 6.2 is Dexos1 Gen 2-certified 0W-20 synthetic motor oil. Using the correct specification helps maintain warranty coverage, performance, and emissions compliance.
Summary
The 2021 GMC 6.2L EcoTec3 engine calls for Dexos1 Gen 2-certified 0W-20 synthetic motor oil. Always confirm the exact specification in your owner's manual and use GM-approved components to preserve warranty and optimal performance.
Can I put 5W-30 in my GMC Sierra?
The GMC Sierra 1500 oil type depends on the kind of engine you have. For a gasoline engine, we recommend SAE 5W-30 Dexos1 full synthetic oil. If you want protection for really low temperatures, consider 0W-30 oil. If you've got a Duramax turbo diesel engine, use SAE 0W-20 DexosD diesel engine oil.
What's the difference between 0W-20 and 0W-40 oil?
Compared to 0W-20 and 5W-30, 0W-40 maintains film strength at higher temperatures, making it ideal for towing, hauling, and extended highway climbs.
What oil to run in 6.2 gmc?
Quick-Reference Chart: Sierra 1500 Oil by Era & Engine
| Generation / Years | Engine (RPO) | Recommended Oil |
|---|---|---|
| 2019–Present (T1) | 6.2L V8 (L87) | 0W-20, dexos1™ |
| 2019–Present (T1) | 2.7L Turbo (L3B) | 5W-30, dexos1™ |
| 2020–Present (T1) | 3.0L Duramax (LM2/LZ0) | 0W-20, dexosD™ |
| 2014–2018 (K2XX) | 5.3L (L83) / 6.2L (L86) | 0W-20, dexos1™ |
What kind of oil does a 2021 GMC 6.2 take?
General Motors is changing the recommended oil for its L87 6.2-liter V-8 engine, a report by GM Authority found. New guidance to dealers recommends Mobil 1 FS 0W-40, rather than Mobil 1 Supercar 0W-40, which has been used since L87-equipped cars were recalled last year.