The 2021 Buick Encore GX is powered by a sophisticated 1.3-liter turbocharged three-cylinder engine that relies on precise engineering to deliver both efficiency and performance. To maintain the integrity of this powertrain, using the correct synthetic lubricants is essential. The small displacement engine operates at high temperatures and pressures, particularly when the turbocharger is engaged. Standard conventional oils often break down under these specific conditions, leading to increased wear, sludge formation, and potential damage to sensitive turbo components. Switching to a high-quality synthetic formula ensures that critical engine parts remain lubricated, reducing friction and helping the vehicle maintain its intended fuel economy over time.
Recommended AMSOIL Products
- AMSOIL Signature Series 0W-20 100% Synthetic Motor Oil – Offers up to 25,000 miles of protection and provides 75% more resistance to horsepower loss and wear compared to industry standards.
- AMSOIL Extended-Life 0W-20 100% Synthetic Motor Oil – Delivers 20,000 miles of guaranteed protection and features 37% more cleaning power to keep the turbo engine running smoothly.
- AMSOIL OE 0W-20 100% Synthetic Motor Oil – A budget-friendly option that is 100% synthetic and outperforms conventional oils to fight sludge and deposits while meeting GM dexos1 Gen 2 requirements.
- AMSOIL 0W-20 100% Synthetic High-Mileage Motor Oil – Specifically formulated for vehicles with over 75,000 miles to reduce sludge and boost detergent performance.
- WIX Oil Filter – Provides premium filtration media that offers improvements over original equipment manufacturer-branded filters to capture contaminants effectively.
Why Proper Lubrication Matters for Your Turbo Engine
The 1.3-liter L3T engine in the 2021 Encore GX is a marvel of modern engineering, packing three cylinders into a compact space. However, this design places significant stress on the engine’s internal components. The turbocharger spins at incredibly high speeds, generating intense heat that requires oil to flow freely and provide consistent lubrication even when the engine is first started in cold weather. AMSOIL 0W-20 synthetic motor oils are engineered to flow instantly at low temperatures while maintaining a protective film at high operating temperatures. This stability is crucial for preventing premature wear on the turbocharger bearings and piston rings, which are vital for the longevity of this specific powerplant.
Proper lubrication also helps manage the buildup of carbon deposits and sludge, a common issue in direct injection and turbocharged engines. By using a high-quality synthetic oil, you ensure that the engine remains clean, which helps preserve fuel efficiency and prevents issues related to clogged oil passages. Whether you are dealing with short city commutes or long highway drives, the right oil makes a measurable difference in how the vehicle performs and how long it lasts.
Engine Oil and Filter Specifications
For the 2021 Buick Encore GX with the 1.3L engine, the recommended oil viscosity is 0W-20. The engine oil capacity, including the filter, is 4.8 quarts. It is important to refill the system with the exact amount and check the oil level after the refill to ensure accurate levels. The WIX Oil Filter (WL10351-EA) is the recommended filtration unit for this application. This filter works in tandem with the AMSOIL motor oils to trap contaminants, ensuring that the oil circulating through the engine remains clean and effective. Choosing between the Signature Series, Extended-Life, OE, or High-Mileage variants depends on your driving habits and the age of the vehicle, but all options are superior to conventional mineral oils.
Automatic Transmission and CVT Fluids
The Encore GX utilizes advanced transmission systems, and selecting the correct fluid is just as critical as choosing the right engine oil. The vehicle may be equipped with a CVT (Continuously Variable Transmission) or a 9-speed automatic transmission, each with specific fluid requirements.
For the CVT systems, AMSOIL 100% Synthetic CVT Fluid is the ideal choice. This fluid is designed to provide exceptional metal-to-metal frictional properties, which helps ensure smooth power delivery and longevity for the transmission belt and pulleys. The total fill capacity varies slightly depending on the specific configuration, ranging from approximately 8.9 to 9.1 quarts with the cooler.
If the vehicle is equipped with the 9-speed automatic transmission, AMSOIL Signature Series Fuel-Efficient 100% Synthetic Automatic Transmission Fluid is highly recommended. This fluid is capable of withstanding the rigors of heavy towing, elevated temperatures, and challenging terrain. It remains fluid in sub-zero temperatures and provides reserve protection during heavy use. The total fill capacity for the 9-speed unit is around 10 quarts, with an initial fill of approximately 5.3 quarts.
Cooling System and Antifreeze
Maintaining the cooling system is vital for the health of the turbocharged engine, as turbochargers operate at extreme heat levels. The 2021 Buick Encore GX requires a coolant capacity of 7.8 quarts. For optimal protection, AMSOIL Passenger Car & Light Truck Antifreeze & Coolant is an excellent choice. This product features a unique poly-organic acid (OAT) formulation that is phosphate-, nitrate-, and silicate-free, making it compatible with all other coolant colors and safe for all cooling system metals, gaskets, and hoses. It offers protection for up to 150,000 miles or 5 years.
Alternatively, AMSOIL Propylene Glycol Antifreeze and Engine Coolant is available as a concentrated option that requires mixing with distilled water. This formulation provides exceptional protection against corrosion and erosion, surpassing industry standards for metallic components.
Differential, Gear Lubricants, and Brake Fluid
While the Encore GX is a front-wheel-drive vehicle, proper lubrication of all moving parts is essential. For the rear differential, AMSOIL SEVERE GEAR® 75W-90 100% Synthetic Gear Lube is recommended. This gear lube contains friction modifiers for limited-slip applications and helps control thermal runaway, protecting against rust and corrosion while reducing operating temperatures. The rear differential capacity is approximately 1.5 pints.
Regarding braking systems, AMSOIL DOT 3 and DOT 4 100% Synthetic Brake Fluid is the top recommendation. This fluid provides a stable viscosity over a wide temperature range and ensures excellent responsiveness for both ABS and traction control systems. It is a critical safety component that prevents brake fade under heavy use.
Additional Maintenance and Vehicle Care
Beyond the essential fluids, several other products can help keep your Buick Encore GX in peak condition. For fuel system maintenance, AMSOIL P.i.® Performance Improver Gasoline Additive is highly effective. It can restore up to 14% horsepower and clean GDI fuel injectors to a 100% flow rate after just one tank of fuel treated, helping to control pre-ignition knock and carbon buildup.
For seasonal storage, AMSOIL Gasoline Stabilizer can keep fuel fresh for up to 12 months, protecting against varnish and gum buildup. If the vehicle will be sitting for extended periods, AMSOIL Engine Fogging Oil can be used to prevent internal rust. For general maintenance, AMSOIL Synthetic Multi-Purpose Grease offers superior low-temperature pumpability and shear stability for chassis components.
Keeping the vehicle clean is also part of its maintenance. Products like AMSOIL Miracle Wash Waterless Wash and Wax Spray can provide a protective finish with minimal effort, while AMSOIL Silicone Spray helps protect rubber and plastic components from drying and cracking. For the undercarriage, AMSOIL Heavy-Duty Metal Protector offers a long-lasting wax-like coating that resists salt and moisture corrosion, a valuable feature for owners in climates with road salts.
About the Vehicle
The 2021 Buick Encore GX represents a significant step forward for the brand, serving as a subcompact luxury crossover that bridges the gap between the original Encore and the larger Envision. Built on the GM E2XX platform, the Encore GX is designed for urban environments yet offers enough capability for family use. It is slightly larger and more spacious than its predecessor, offering improved cargo capacity and rear passenger room, which are key factors for buyers in the subcompact SUV segment.
Under the hood, the 1.3-liter turbocharged three-cylinder engine is the heart of the Encore GX. It is designed to balance fuel economy with adequate power for a vehicle of its size. The engine features a turbocharger to boost power output, allowing a small engine to perform like a larger one. This setup is common in modern compact cars where efficiency is a priority, but it also means the engine runs at higher temperatures and pressures than naturally aspirated engines. The 9-speed automatic transmission paired with this engine helps keep the engine in its most efficient power band, contributing to the vehicle’s fuel-efficient profile.
Owners of the Encore GX typically appreciate its premium interior quality, which distinguishes it from non-luxury competitors. The cabin is designed with high-quality materials, a quiet ride, and a user-friendly infotainment system. The vehicle’s ride quality is often praised for being composed and comfortable, absorbing road imperfections well. However, like any turbocharged vehicle, the Encore GX benefits from the use of high-performance fluids to handle the thermal loads generated by the turbocharger and the compact engine bay.
There are some common issues that owners of this vehicle have encountered, which can be mitigated or managed with proper lubrication. One potential concern is turbocharger wear, particularly if the vehicle is frequently driven in stop-and-go traffic without proper warm-up or cool-down procedures. Using an oil with excellent thermal stability helps protect the turbo bearings from oil coking. Another issue sometimes reported is the buildup of carbon deposits on intake valves, common in direct injection engines; fuel additives like AMSOIL P.i. can help clean and prevent this accumulation. Some owners have also noted that the transmission can be sensitive to fluid degradation; using a high-quality synthetic transmission fluid can help prevent shuddering or harsh shifting. Finally, for those living in colder climates, cold-start protection is vital; a synthetic oil with a low viscosity rating like 0W-20 ensures rapid oil flow, reducing wear during the critical first few minutes of operation. By addressing these specific needs with the right lubricants, owners can ensure their Encore GX remains a reliable and enjoyable daily driver for years to come.