Buick Regal
Data verified by Nick Marchenko, PhD
Maintaining the engine oil in your Buick Regal is crucial for ensuring optimal performance and longevity. The 1999–2017 Buick Regal offers a variety of engine options, including the L36 and L67 3.8L V-6 engines, both requiring 4.5 quarts of 5W-30 oil. For the more modern models, such as the 2.0L I-4 engines (LTG and LHU), the oil capacity increases to 6 quarts, while the hybrid LEA engine also utilizes 5 quarts of 5W-30 oil.
Regular oil changes are essential, and it's important to also monitor the coolant levels, which vary by engine type. For example, the L36 engine has a coolant capacity of 11.6 quarts, while the LAF engine requires only 7.5 quarts. Keeping track of these specifications will help maintain your Buick Regal's performance and prevent potential engine issues.
Buick Regal Oil Capacity
| Engine | Oil Capacity | Viscosity | Coolant | Years |
|---|---|---|---|---|
| L36 Buick V6 Series 2 The L36 engine has a displacement of 3.8L V-6. | 4.5 qt | 5W-30 | 11.6 qt | 2004 |
| L36 Buick V6 Series 2 The L36 engine has a displacement of 3.8L V-6. | 4.5 qt | 5W-30 | 12.2 qt | 2003, 2002, 2001, 2000, 1999 |
| L67 Buick V6 Series 2 The L67 engine has a displacement of 3.8L V-6. | 4.5 qt | 5W-30 | 11.6 qt | 2004 |
| L67 Buick V6 Series 2 The L67 engine has a displacement of 3.8L V-6. | 4.5 qt | 5W-30 | 12.2 qt | 2003, 2002, 2001, 2000, 1999 |
| LAF GM Ecotec 2.4 The LAF engine has a displacement of 2.4L I-4. | 5.0 qt | 5W-30 | 7.5 qt | 2011 |
| LEA L-Series LE The LEA engine has a displacement of Hybrid Electric Motor 1.5L I-4. It features a bore and stroke of 73 mm × 89.4 mm. The power output is 112 hp with a torque of 107 lb-ft. It has a redline of 6500 RPM. The compression ratio is 10.4:1. The valve train is SOHC 16 valve. | 5.0 qt | 5W-30 | 7.5 qt | 2017, 2016, 2015, 2012 |
| LHU GM Ecotec 2.0 The LHU engine has a displacement of 2.0L I-4. | 6.0 qt | 5W-30 | 8.2 qt | 2011 |
| LHU GM Ecotec 2.0 The LHU engine has a displacement of 2.0L I-4. | 6.3 qt | 5W-30 | 8.2 qt | 2013, 2012 |
| LTG 2.0 L Turbo GM Ecotec 2.0 The LTG 2.0 L Turbo engine has a displacement of 2.0L I-4. | 6.0 qt | 5W-30 | 7.8 qt | 2017, 2016, 2015 |
| LTG 2.0 L Turbo GM Ecotec 2.0 The LTG 2.0 L Turbo engine has a displacement of 2.0L I-4. | 6.0 qt | 5W-30 | 8.2 qt | 2014 |
| LUK GM Ecotec 2.4 The LUK engine has a displacement of 2.4L I-4. | 5.0 qt | 5W-30 | 7.5 qt | 2013, 2012 |
| LUK GM Ecotec 2.4 The LUK engine has a displacement of 2.4L I-4. | 5.0 qt | 5W-30 | 10.1 qt | 2016, 2015, 2014 |
Buick Regal – Frequently Asked Questions
How many quarts of oil does the Buick Regal take?
The Buick Regal oil capacity varies by engine: L36: 4.5 qt; L36: 4.5 qt; L67: 4.5 qt; L67: 4.5 qt; LAF: 5.0 qt; LEA: 5.0 qt; LHU: 6.0 qt; LHU: 6.3 qt; LTG 2.0 L Turbo: 6.0 qt; LTG 2.0 L Turbo: 6.0 qt; LUK: 5.0 qt; LUK: 5.0 qt. Always confirm the exact capacity for your specific engine before an oil change.
What type of oil does the Buick Regal use?
The Buick Regal uses 5W-30 engine oil across all its engine variants. Full synthetic oil meeting API/ILSAC specifications is strongly recommended for optimal engine protection and performance.
What is the coolant capacity of the Buick Regal?
The coolant capacity for the Buick Regal varies by engine: L36: 11.6 qt; L36: 12.2 qt; L67: 11.6 qt; L67: 12.2 qt; LAF: 7.5 qt; LEA: 7.5 qt; LHU: 8.2 qt; LHU: 8.2 qt; LTG 2.0 L Turbo: 7.8 qt; LTG 2.0 L Turbo: 8.2 qt; LUK: 7.5 qt; LUK: 10.1 qt. Use the coolant specification listed in the owner's manual for your engine variant.
What type of oil does the Buick Regal use?
The Buick Regal typically uses 5W-30 viscosity oil across its various engine options, including the L36, L67, and LHU engines.
How many quarts of oil does the Buick Regal take?
The oil capacity for the Buick Regal varies by engine. For example, the L36 and L67 engines require 4.5 quarts, while the LHU and LTG engines need 6 quarts.
How often should I change oil in a Buick Regal?
It is generally recommended to change the oil in your Buick Regal every 5,000 to 7,500 miles, depending on driving conditions and oil type.
What is the coolant capacity of the Buick Regal?
Coolant capacity varies by engine type. For instance, the L36 engine has a coolant capacity of 11.6 quarts, while the LAF engine requires 7.5 quarts.
Does the Buick Regal need synthetic oil?
While synthetic oil is not required, it is recommended for better performance and protection, especially in extreme temperatures.
What happens if I use the wrong oil viscosity in my Buick Regal?
Using the wrong oil viscosity can lead to insufficient lubrication, increased engine wear, and potential overheating, which can damage the engine.
What is an oil life monitor and how does it work?
An oil life monitor tracks your engine's operating conditions and calculates when an oil change is necessary, helping you maintain optimal engine health.
Can I mix synthetic and conventional oil?
While it is technically possible to mix synthetic and conventional oils, it is not recommended as it can reduce the effectiveness of the synthetic oil.
How do I know if my Buick Regal has an oil leak?
Signs of an oil leak include oil spots under the vehicle, a burning oil smell, or a drop in oil levels without an explanation.
What causes excessive oil consumption?
Excessive oil consumption can be caused by worn piston rings, valve seals, or gaskets, leading to oil burning in the combustion chamber.
Should I check my oil when the engine is hot or cold?
It is best to check your oil when the engine is warm but not hot, as this allows for a more accurate reading of the oil level.
What is the difference between an oil change and a flush?
An oil change involves replacing old oil with new oil, while an oil flush cleans the engine internally, removing sludge and deposits before adding new oil.