Complete Oil Specifications
Your 2023 Buick Enclave with the 3.6L LGX V6 requires 5W-30 full synthetic oil meeting GM dexos1 Gen 3 specification (API SP / ILSAC GF-6A).
Quick Reference
| Specification | Value |
|---|---|
| Viscosity | 5W-30 |
| GM Approval | GM dexos1 Gen 3 / API SP |
| ILSAC Rating | GF-6A |
| Capacity (with filter) | 6.0 quarts |
| Oil Filter | ACDelco PF63E |
| Normal Interval | 7500 miles |
Why dexos1 Gen 3 is Critical for This Engine
The LGX V6 uses Variable Valve Timing (VVT) on both intake and exhaust camshafts, along with Continuously Variable Valve Lift (CVVL) — a system that varies how far intake valves open based on load. The CVVL mechanism uses oil pressure to change the cam follower geometry, and GM’s dexos1 Gen 3 oil is specifically formulated to maintain precise hydraulic control in this system across temperature extremes. Using oil with the wrong additive package can cause CVVL response lag, noticeable as flat power delivery until the engine warms.
Using incorrect oil will:
- ❌ Impair CVVL function, reducing low-RPM torque and fuel efficiency
- ❌ Void the GM powertrain warranty — dexos1 is a warranty requirement
- ❌ Accelerate VVT cam phaser wear with incorrect additive chemistry
GM-Approved Oil Brands
-
✅ ACDelco dexos1 Gen 3 Full Synthetic 5W-30
-
✅ Mobil 1 dexos1 Full Synthetic 5W-30
-
✅ Pennzoil Platinum dexos1 Full Synthetic 5W-30
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✅ Castrol Edge dexos1 Full Synthetic 5W-30
-
✅ Valvoline dexos1 Full Synthetic 5W-30
Specifically purchase oils marked dexos1 Gen 3 — older dexos1 or dexos1 Gen 2 products are not interchangeable with the current Gen 3 standard.
Severe Service Check
You need the 3750-mile interval if you:
- Tow a trailer or carry 7-passenger loads regularly
- Drive predominantly in stop-and-go city traffic
- Idle frequently (school pickup lines, drive-throughs)
- Operate in extreme heat (above 95°F) or cold (below -20°F)
Installation Details
Drain Plug Torque: 18 ft-lbs
Replace the drain plug gasket at every oil change. The LGX uses an aluminum oil pan.
OEM Filter: ACDelco PF63E
Aftermarket Filters:
-
Wix 57145XP
-
Fram XG10575
-
K&N HP-1017
Pro Tip: Always follow the Oil Life Monitor in the Driver Information Center. Enclave owners who frequently carry full passenger loads and luggage will see shorter intervals than the 7,500-mile maximum.
FAQs
What oil does a 2023 Buick Enclave 3.6L V6 take?
5W-30 full synthetic oil meeting GM dexos1 Gen 3 (API SP / ILSAC GF-6A).
How many quarts does it need?
6.0 quarts with a new filter.
Can I use 0W-20 instead of 5W-30?
No. The LGX V6 is specified for 5W-30. The CVVL system’s hydraulic control is calibrated for 5W-30 pressure characteristics.
Is the Enclave the same engine as the Traverse?
Yes. The Chevrolet Traverse and Buick Enclave share the LGX V6 with identical oil specifications.
How often should I change the oil?
Follow the Oil Life Monitor; approximately every 7500 miles for mixed driving, 3750 miles for heavy family-hauler use.
Need these specs on your phone? Download OilFinderPro app for offline access and oil change reminders.
Last verified: 2026-04-19 | Source: 2023 Buick Enclave Owner’s Manual