The 2023 Buick Encore GX with the 1.3L L3T L Turbo engine requires specific lubrication to maintain its high-performance characteristics and ensure long-term reliability. Turbocharged engines, like the one found in this compact SUV, place significant stress on internal components due to the extreme temperatures and pressures generated during operation. Using the correct viscosity and a high-quality synthetic motor oil formulation is essential to prevent sludge buildup, reduce wear on the turbocharger, and maintain optimal fuel economy. Beyond the engine, the transmission, cooling system, and braking components all rely on factory-specified fluids to operate safely and efficiently. Deviating from recommended fluid specifications can lead to reduced performance, increased repair costs, and a shortened lifespan for critical vehicle systems.
Recommended AMSOIL Products
- AMSOIL Signature Series 0W-20 100% Synthetic Motor Oil – Offers the highest level of protection with up to 25,000 miles of guaranteed performance, featuring superior resistance to horsepower loss and wear for turbocharged engines.
- AMSOIL Extended-Life 0W-20 100% Synthetic Motor Oil – Provides 20,000 miles of protection with enhanced cleaning power to keep the engine running smoother and longer, specifically designed to fight low-speed pre-ignition (LSPI).
- AMSOIL OE 0W-20 100% Synthetic Motor Oil – A cost-effective synthetic option that outperforms conventional oils, featuring a formulation that helps prevent sludge and deposits while protecting turbochargers.
- AMSOIL 0W-20 100% Synthetic High-Mileage Motor Oil – Formulated specifically for vehicles with over 75,000 miles, utilizing unique chemistry to reduce sludge and restore engine cleanliness for older Encore GX models.
- WIX Oil Filter – The recommended filter for this vehicle, offering premium media that outperforms OEM filters to ensure optimal oil flow and filtration efficiency.
- AMSOIL Passenger Car & Light Truck Antifreeze & Coolant – A phosphate- and nitrite-free ethylene glycol coolant that exceeds OEM requirements, protecting the cooling system for up to 150,000 miles.
- AMSOIL Propylene Glycol Antifreeze and Engine Coolant – A concentrated non-toxic coolant that offers extended protection up to 150,000 miles and 5 years, ideal for drivers seeking a safer, high-performance cooling solution.
- AMSOIL 100% Synthetic CVT Fluid – Designed for the CVT250 transmission found in this model, providing exceptional metal-to-metal frictional properties to ensure smooth shifting and longevity.
- AMSOIL Signature Series Fuel-Efficient 100% Synthetic Automatic Transmission Fluid – The ultimate protection for the 9T45 automatic transmission, remaining fluid in sub-zero temperatures while withstanding the rigors of heavy towing and elevated heat.
- AMSOIL OE Fuel-Efficient 100% Synthetic Automatic Transmission Fluid – A reliable synthetic alternative for the automatic transmission that protects against wear while maintaining fuel efficiency.
- AMSOIL SEVERE GEAR® 75W-90 100% Synthetic Gear Lube – Recommended for the rear differential to control thermal runaway, protect against rust, and extend the life of seals and equipment.
- AMSOIL DOT 3 and DOT 4 100% Synthetic Brake Fluid – Provides excellent ABS and traction-control responsiveness with a stable viscosity over a wide temperature range for safer braking performance.
Why Engine Oil Selection Matters for the L3T Turbo
The 1.3L L3T turbocharged engine in the 2023 Buick Encore GX operates under significantly higher thermal stress than naturally aspirated engines. The turbocharger spins at incredibly high speeds, generating intense heat that can degrade standard mineral oils rapidly. AMSOIL synthetic motor oils are engineered to withstand these extreme conditions without breaking down. Whether you choose the Signature Series, Extended-Life, or OE formulation, you are providing a lubricant that resists thickening in cold weather and thinning in high heat. This ensures consistent oil pressure and protection from the moment you start the engine, regardless of the outside temperature.
The recommended capacity for the engine oil is 4.8 quarts when including the filter change. It is crucial to refill to the specified amount and then check the oil level after the engine has cooled down to ensure accuracy. Filling beyond the recommended capacity can cause foaming and increased crankcase pressure, while underfilling can lead to insufficient lubrication and catastrophic engine failure. The included WIX Oil Filter is specifically selected to match the engine’s flow requirements, capturing contaminants effectively to keep the oil clean and the engine running smoothly.
Transmission and Drivetrain Fluids
The Encore GX is available with either a continuously variable transmission (CVT) or a 9-speed automatic. Each system has unique fluid requirements that are critical for their operation. For the CVT250 models, the total fill capacity with the cooler is 9.1 quarts, while the initial fill or cooler-less variations may require 8.9 quarts. Using the correct fluid is non-negotiable for CVTs, as they rely on specific friction modifiers to operate the pulley system without slipping. The AMSOIL 100% Synthetic CVT Fluid is tailored to meet these exacting demands, ensuring smooth operation and preventing premature wear.
For the 9T45 automatic transmission models, the fluid capacity is approximately 10 quarts for a total fill, with an initial fill of around 5.3 quarts (5.0 to 6.0 liters). These transmissions are subjected to significant heat and load, especially during aggressive driving or towing. The AMSOIL Signature Series Fuel-Efficient Automatic Transmission Fluid or the OE version offers superior protection against wear, oxidation, and sludge. These fluids remain fluid in sub-zero conditions and provide a reserve of protection during heavy use, extending the service life of the transmission.
The differential in the rear of the vehicle requires lubrication to handle torque and wear. The recommended capacity is 1.5 pints. AMSOIL SEVERE GEAR® 75W-90 100% Synthetic Gear Lube is the ideal choice here. It contains friction modifiers for limited-slip applications and helps reduce operating temperatures, protecting the gears and bearings from rust and corrosion. This synthetic gear lube offers long oil, seal, and equipment life, ensuring the rear axle remains reliable over the life of the vehicle.
Cooling and Brake System Maintenance
A healthy cooling system is vital for preventing the L3T engine from overheating. The coolant capacity for the 2023 Encore GX is 7.8 quarts. Owners can choose between the AMSOIL Passenger Car & Light Truck Antifreeze & Coolant, which comes pre-mixed and protected for 150,000 miles or 5 years, or the Propylene Glycol Antifreeze, which offers concentrated protection for up to 150,000 miles and is non-toxic. Both options are phosphate-, nitrate-, nitrite-, silicate-, borate-, and amine-free, preventing silicate dropout and ensuring compatibility with all cooling system metals, gaskets, and hoses.
Brake performance is a primary safety concern for any vehicle. The recommended brake fluid is a DOT 4 Hydraulic Brake Fluid, which can be replaced with AMSOIL DOT 3 and DOT 4 100% Synthetic Brake Fluid. This synthetic fluid provides a stable viscosity across a wide temperature range, ensuring consistent pedal feel and excellent responsiveness for ABS and traction control systems. Unlike conventional fluids that absorb moisture over time and lower their boiling point, this synthetic fluid resists moisture absorption, maintaining its performance characteristics for longer periods.
About the Vehicle
The 2023 Buick Encore GX represents the brand’s commitment to providing premium, upscale styling and advanced technology within a compact crossover format. Built on the same global architecture as the Chevrolet Trailblazer, the Encore GX occupies a unique spot in the market, offering a more refined and quiet driving experience compared to some of its counterparts. The specific 1.3L turbocharged engine discussed in this guide is a high-output three-cylinder powerhouse designed to deliver impressive acceleration and fuel efficiency in a small displacement package. This engine technology allows the vehicle to meet stringent emissions standards while still providing ample power for city commuting and highway merging.
Interior comfort and connectivity are hallmarks of the Encore GX, with available features like a dual-pane panoramic sunroof, wireless charging, and the Buick Infotainment System. The vehicle’s compact dimensions make it highly maneuverable in urban environments, while the available all-wheel-drive system enhances confidence in inclement weather. Buick has positioned the Encore GX as a sophisticated entry-level luxury SUV, appealing to drivers who want a premium feel without the size of a full-scale crossover. Its reputation for a smooth ride and quiet cabin makes it a popular choice for daily drivers and families looking for a reliable, efficient, and stylish vehicle.