Understanding the specific fluid requirements for your 2016 Buick LaCrosse is the first step in preventative maintenance. The engine compartment houses systems that operate under significant thermal and mechanical stress. By selecting synthetic fluids, you are actively choosing to minimize the friction that leads to premature wear. Synthetic motor oils, in particular, flow more easily in cold weather and resist breaking down at high temperatures, ensuring that oil pressure is maintained when it is needed most.
Engine Oil and Filtration Essentials
The heart of the 2016 Buick LaCrosse 2.4L engine requires a precise balance of viscosity and additive packages to function correctly. The recommended capacity for an oil change, including the filter, is 5.0 quarts. It is critical to adhere to this measurement to ensure proper oil levels and pressure. The 5W-30 viscosity grade is specified for all temperature conditions, making it versatile for year-round driving.
Among the top contenders for this engine is the AMSOIL Signature Series 5W-30. This 100% synthetic oil is engineered to provide 75% more protection against horsepower loss and wear compared to standards set by competitors. It supports extended drain intervals of up to 25,000 miles or one year, making it a cost-effective choice for high-mileage drivers or those who prefer minimizing maintenance frequency. For owners seeking a balance between performance and value, the AMSOIL Extended-Life 5W-30 offers a guaranteed 20,000 miles of protection. It includes unique cleaning technology that helps keep the engine running smoother and longer, specifically targeting the prevention of low-speed pre-ignition (LSPI) in turbocharged engines.
Furthermore, the AMSOIL OE 5W-30 provides a direct alternative for those who want a formulation that outperforms conventional oils while meeting OEM milestones. It fights sludge and deposits effectively with its 100% synthetic base. For vehicles that have accumulated significant mileage, exceeding 75,000 miles, the AMSOIL 5W-30 100% Synthetic High-Mileage Motor Oil is the optimal selection. This oil features a boosted detergent and dispersant package that reduces sludge by 67%, helping older engines maintain better compression and performance.
Filtration is equally vital. The AMSOIL Oil Filter is designed to filter at 99% efficiency at 20 microns, allowing for lower restriction and keeping engine parts lubricated even as the oil circulates. It offers greater capacity for small, wear-causing contaminants than competing filters. Alternatively, the WIX Oil Filter serves as a premium aftermarket option that offers improvements over original equipment manufacturer-branded filters, ensuring that contaminants are captured effectively to protect the engine’s sensitive internal components.
Transmission and Drivetrain Protection
The automatic transmission in the 2016 LaCrosse, specifically the 6-speed 6T40 (AF6), requires a fluid that can handle the rigors of modern driving conditions. The total fill capacity for a complete transmission service is 9 quarts, though an initial fill requires approximately 6.3 quarts, with the actual operational capacity ranging between 4.0 and 6.0 liters. Using the wrong fluid can lead to shift harshness and premature wear.
The AMSOIL Signature Series Fuel-Efficient 100% Synthetic Automatic Transmission Fluid is formulated to withstand heavy towing, elevated temperatures, and challenging terrain. It remains fluid in sub-zero temperatures, providing reserve protection during heavy use. For owners looking for a fuel-efficient solution that protects against wear without the premium price point of the Signature Series, the AMSOIL OE Fuel-Efficient 100% Synthetic Automatic Transmission Fluid is an excellent choice. Both fluids are designed to enhance the lifespan of the transmission system, ensuring smooth shifts and reliable performance.
Regarding the differential and limited-slip applications, the LaCrosse rear differential requires specific attention. For limited-slip differentials (Rear Limited Slip DIFF….SL136), the capacity is 1.4 pints. It is crucial to add 0.05 liters (1.69 oz) of LSD additive, GM P/N 88900330, to ensure proper operation. The AMSOIL SEVERE GEAR® 75W-90 100% Synthetic Gear Lube is the recommended product for this application. It contains friction modifiers that are essential for limited-slip differentials, controlling thermal runaway and protecting against rust and corrosion. This lube helps reduce operating temperatures and extends the life of both the oil and seals.
Cooling System and Brake Fluids
The cooling system capacity for the 2.4L engine is approximately 10.1 quarts. Maintaining the correct AMSOIL Passenger Car & Light Truck Antifreeze & Coolant is essential to prevent overheating and corrosion. The AMSOIL Propylene Glycol Antifreeze and Engine Coolant is a unique poly-organic acid (OAT) formulation that allows for use in a wide variety of vehicles. It is a 50/50 pre-mix ethylene glycol formulation that protects all cooling system metals, gaskets, and hoses. This coolant is phosphate-, nitrate-, nitrite-, silicate-, borate-, and amine-free, making it compatible with all other antifreeze and coolant colors.
For those who prefer a concentrated antifreeze that requires mixing with distilled water, the AMSOIL Propylene Glycol Antifreeze and Engine Coolant is a superior non-toxic option. It offers protection up to 150,000 miles or 5 years and greatly surpasses standards for metallic corrosion and erosion. This concentrated formula is ideal for those who want to optimize their coolant mix and maximize the lifespan of their cooling system.
AMSOIL DOT 3 and DOT 4 100% Synthetic Brake Fluid safety cannot be overlooked. The 2016 Buick LaCrosse utilizes hydraulic brake fluid meeting DOT 3 specifications. The AMSOIL DOT 3 and DOT 4 100% Synthetic Brake Fluid provides excellent ABS and traction-control responsiveness. Its stable viscosity over a wide temperature range ensures consistent braking performance in all conditions, from freezing winters to hot summer days. This synthetic fluid helps protect the brake system from moisture absorption, which can lower boiling points and lead to brake fade.
Additional Care and Seasonal Maintenance
To keep your LaCrosse in peak condition throughout the year, consider additional fluids and additives. For seasonal storage, AMSOIL Gasoline Stabilizer helps keep fuel fresh for up to 12 months, protecting against varnish and gum buildup while fighting ethanol corrosion. This is ideal for storing seasonal equipment or vehicles that will sit for extended periods. For engines that require protection during long-term inactivity, AMSOIL Engine Fogging Oil serves as a highly effective rust preventive for internal engine components.
For those looking to improve fuel economy and restore power, the AMSOIL P.i.® Performance Improver Gasoline Additive can restore up to 14% horsepower and clean GDI fuel injectors to 100% flow rate after just one tank of fuel. It helps prevent carbon buildup and reduces the need for costly higher-octane fuels. Additionally, the AMSOIL Upper Cylinder Lubricant Corrosion Inhibitor lubricates the fuel system and upper cylinders, providing an extra layer of protection against wear and corrosion.
About the Vehicle
The 2016 Buick LaCrosse is widely recognized as a benchmark in the mid-size luxury sedan segment. Built on the E2 platform, this generation of the LaCrosse represents a significant evolution in Buick’s design language, often referred to as the “American Grand Tourer.” The vehicle blends a smooth, comfortable ride with a modern, spacious interior that appeals to both family users and those seeking a more sophisticated commuting experience. The brand positioned the LaCrosse to compete with German luxury imports while maintaining a more approachable price point and a distinctively American driving character.
Powering the 2.4L model is a dual-overhead cam, 16-valve Ecotec engine designed for efficiency and reliability. While the larger V6 and V8 engines in the lineup offered more raw power, the 2.4L inline-four strikes a balance that is popular among drivers who prioritize fuel economy without sacrificing the smoothness and quietness expected from a Buick. The engine features variable valve timing and a sophisticated oiling system that reduces friction, contributing to better fuel mileage and reduced emissions. The interior of the 2016 model year is celebrated for its high-quality materials, soft-touch surfaces, and the introduction of the IntelliLink infotainment system, which improved connectivity for drivers and passengers alike.
Driven by a blend of comfort and capability, the LaCrosse offers a ride quality that soaks up road imperfections, making it an ideal choice for long-distance travel. Its spacious cabin provides ample legroom and headroom, while the trunk offers generous cargo capacity for a sedan of its class. The vehicle’s reputation for reliability and low maintenance costs, when proper lubrication practices are followed, has made it a favorite among fleet managers and individual owners. Over the years, the LaCrosse has solidified Buick’s reputation for building vehicles that are both practical and premium, offering a driving experience that feels substantial and refined.