Buick Regal Engine Oil Capacity: All Years & Engines

The Buick Regal has been produced across multiple generations with various engine options. Using the correct oil capacity, viscosity, and type is essential for maintaining engine performance and longevity. This guide lists all model years from 1997 to 2020 with full oil specifications and maintenance recommendations.

The Regal was discontinued in North America from 2005 to 2010, then reintroduced in 2011 as a mid-size sedan before production ended in 2020. Each generation features different engine configurations requiring specific oil capacities and types.

2020 Buick Regal Engine Oil Capacity

The 2020 Buick Regal uses three engine options with varying oil capacities based on drivetrain configuration. The 2.0L Turbo FWD requires 5 quarts of full synthetic oil, while AWD models need 6 quarts.

2019 Buick Regal Engine Oil Capacity

The 2019 Buick Regal maintains the same engine lineup and oil specifications as the 2020 model. Using Dexos1-approved full synthetic oil ensures optimal engine protection and fuel efficiency.

2018 Buick Regal Engine Oil Capacity

The 2018 Buick Regal represents the sixth generation model with updated engine options. All engines require dexos1 approved full synthetic oil for proper lubrication and protection.

2017 Buick Regal Engine Oil Capacity

The 2017 Buick Regal uses turbocharged four-cylinder engines that deliver power while maintaining efficiency. Using SAE 5W-30 synthetic oil provides optimal protection across temperature ranges.

2016 Buick Regal Engine Oil Capacity

The 2016 Buick Regal requires full synthetic motor oil meeting dexos1 specifications. Using the correct viscosity ensures proper engine lubrication during cold starts and high operating temperatures.

2015 Buick Regal Engine Oil Capacity

The 2015 Buick Regal benefits from regular oil changes at 7,500-mile intervals. Full synthetic oil provides superior protection against thermal breakdown and sludge formation.

2014 Buick Regal Engine Oil Capacity

The 2014 Buick Regal features turbocharged engines requiring premium synthetic motor oil. The eAssist mild hybrid system uses the same oil specifications as non-hybrid variants.

2013 Buick Regal Engine Oil Capacity

The 2013 Buick Regal continues with three engine options requiring full synthetic oil. Regular maintenance intervals help maximize engine life and performance.

2012 Buick Regal Engine Oil Capacity

The 2012 Buick Regal marked mid-year updates with new engine codes. All variants require dexos1 approved synthetic oil for optimal protection.

2011 Buick Regal Engine Oil Capacity

The 2011 Buick Regal reintroduced the model to North America after a seven-year absence. Both turbocharged and eAssist engines require premium full synthetic motor oil.

2004 Buick Regal Engine Oil Capacity

The 2004 Buick Regal uses the proven 3800 Series II V6 engine in naturally aspirated and supercharged forms. Both require 4.5 quarts of motor oil with filter replacement.

2003 Buick Regal Engine Oil Capacity

The 2003 Buick Regal continues with the 3.8L V6 engine platform. Using 5W-30 viscosity oil provides adequate protection for most driving conditions.

2002 Buick Regal Engine Oil Capacity

The 2002 Buick Regal maintains consistent specifications with previous model years. The 3800 Series II engine requires regular oil changes for reliable operation.

2001 Buick Regal Engine Oil Capacity

The 2001 Buick Regal uses the reliable 3.8L V6 engine that requires 4.5 quarts with filter. Supercharged models benefit from synthetic oil for enhanced thermal protection.

2000 Buick Regal Engine Oil Capacity

The 2000 Buick Regal features two versions of the 3.8L V6 engine. The LS trim uses a 200-horsepower naturally aspirated engine, while the GS trim features a 240-horsepower supercharged variant.

1999 Buick Regal Engine Oil Capacity

The 1999 Buick Regal maintains the 3.8L V6 engine with 4.5 quarts oil capacity. Regular oil changes help prevent sludge buildup and maintain engine cleanliness.

1998 Buick Regal Engine Oil Capacity

The 1998 Buick Regal uses the proven 3800 Series II V6 engine requiring 4.5 quarts of motor oil. Both engine variants use the same oil capacity specifications.

1997 Buick Regal Engine Oil Capacity

The 1997 Buick Regal introduced the redesigned fifth generation model with updated 3800 Series II engines. Both naturally aspirated and supercharged variants require 4.5 quarts of motor oil with filter.

Oil Maintenance and Service Tips

Checking and changing engine oil regularly ensures your Buick Regal maintains optimal performance and longevity. Engine oil lubricates moving components, reduces friction, and removes heat from critical areas.

Checking Oil Level

Check oil level when the engine is cold and the vehicle is parked on level ground. Remove the dipstick, wipe it clean, reinsert fully, then remove to read the level. The oil should be between the minimum and maximum marks.

Oil Change Procedure

Modern Buick Regal models from 2011 onwards use full synthetic oil with 7,500-mile change intervals. Earlier models with conventional oil require changes every 3,000 miles or three months. Always replace the oil filter during each oil change to maintain proper filtration.

Oil Filter Replacement

Use manufacturer-approved oil filters to ensure proper flow rates and filtration efficiency. ACDelco OEM filters are recommended, with quality aftermarket alternatives including Mobil 1, Fram, and K&N available.

Oil Type Selection

Models from 2011 and newer require dexos1 approved full synthetic motor oil to meet GM specifications. Older 3.8L V6 engines can use conventional, synthetic blend, or full synthetic oil. Supercharged engines benefit from synthetic oil for enhanced thermal protection.

Severe driving conditions include frequent short trips, extensive idling, towing, dusty environments, or extreme temperatures.

Frequently Asked Questions

What kind of oil does a Buick Regal use?

The Buick Regal uses full synthetic oil for 2011-2020 models, requiring dexos1 approved SAE 5W-30 or 0W-30 viscosity. Models from 1997-2004 use conventional or synthetic blend 5W-30 or 10W-30 oil.

How much oil does a Buick Regal take?

Oil capacity varies by engine and model year. Modern 2.0L turbo FWD engines require 5 quarts, while AWD variants need 6 quarts. The 3.6L V6 requires 6 quarts, and older 3.8L V6 engines from 1997-2004 need 4.5 quarts with filter.

What is the recommended oil type for a Buick Regal?

Buick recommends dexos1 approved full synthetic motor oil for 2011-2020 models. Suitable brands include ACDelco dexos1 Full Synthetic and Mobil 1 Advanced Full Synthetic. Older models can use conventional or synthetic blend oil meeting GM specifications.

What is the oil change interval for a Buick Regal?

Modern Regals from 2011-2020 require oil changes every 7,500 miles or 12 months under normal driving conditions. Severe driving conditions reduce the interval to 5,000 miles. Models from 1997-2004 need oil changes every 3,000 miles or three months.

Can I use 0W-20 oil in my Buick Regal?

Only use 0W-20 oil if specifically recommended in your owner’s manual. Most Buick Regal models require 5W-30 or 0W-30 viscosity. Using incorrect viscosity can affect engine protection and fuel economy.

What is the oil drain plug torque specification?

The oil drain plug torque specification for Buick Regal models is 18 lb-ft (24 N·m) across all years. Proper torque prevents oil leaks and avoids damaging the oil pan threads.

Conclusion

Maintaining your Buick Regal with proper oil capacity, viscosity, and type ensures optimal engine performance and longevity. Models from 2011-2020 require full synthetic dexos1 approved oil with 7,500-mile change intervals, while earlier 1997-2004 models use conventional or synthetic blend oil with 3,000-mile intervals.

Always consult your owner’s manual for specific recommendations and follow manufacturer guidelines. Using the correct oil specifications protects critical engine components, maintains fuel efficiency, and prevents costly repairs. Regular oil changes combined with quality filters keep your Buick Regal running smoothly for years to come.