Maintaining your 2023 Toyota Highlander with the 2.4L turbocharged engine requires fluids that can handle the specific demands of modern direct injection and forced induction systems. Using the correct viscosity and meeting the strict OEM specifications for the T24A-FTS engine code is essential for longevity, performance, and fuel efficiency. Proper lubrication ensures that the turbocharger operates within safe temperature ranges and that internal components are protected against the high stresses of daily driving and towing.
Recommended AMSOIL Products
- AMSOIL Signature Series 0W-20 100% Synthetic Motor Oil – The top-tier choice for maximum protection, offering extended drain intervals up to 25,000 miles or one year while providing superior protection against horsepower loss and wear for the turbocharged engine.
- AMSOIL Extended-Life 0W-20 100% Synthetic Motor Oil – A robust alternative that delivers 20,000 miles of protection between changes with enhanced cleaning power to keep the high-pressure fuel system and turbocharger running smoothly.
- AMSOIL OE 0W-20 100% Synthetic Motor Oil – An excellent value option designed to outperform conventional oils, providing strong defense against sludge and deposits while ensuring the engine meets or exceeds original equipment requirements.
- AMSOIL 0W-20 100% Synthetic High-Mileage Motor Oil – Specifically formulated for vehicles with over 75,000 miles, this fluid features boosted detergents and anti-wear additives to reduce sludge and help extend engine life.
- AMSOIL Oil Filter – Features a filter media with 99% efficiency at 20 microns, allowing for lower restriction to keep critical engine parts lubricated and offering greater capacity for capturing wear-causing contaminants.
- WIX Oil Filter – A high-performance aftermarket filter option that offers improvements over standard OEM-branded filters, ensuring proper oil flow and contaminant removal for the Highlander.
The engine for this specific Highlander model requires a total fluid capacity of 5.6 quarts when the filter is changed. After refilling, it is critical to check the oil level to ensure proper coverage. The torque specification for the oil drain plug is 30 ft/lbs, and owners should always replace the drain plug gasket during service to prevent leaks.
Protecting the Transmission and Drivetrain
The 2023 Highlander’s 8-speed automatic transmission, specifically the UA81E or UA81F variants, benefits significantly from a fluid that remains stable under heavy loads, elevated temperatures, and challenging terrain. AMSOIL offers two primary choices for the transmission, which has a total fill capacity of 7.5 quarts.
For drivers who tow or frequently encounter stop-and-go traffic, the AMSOIL Signature Series Fuel-Efficient 100% Synthetic Automatic Transmission Fluid is an ideal choice. It withstands the rigors of heavy towing and provides reserve protection during severe abuse while remaining fluid in sub-zero temperatures. For those prioritizing a budget-friendly option that still meets OEM standards, the AMSOIL OE Fuel-Efficient 100% Synthetic Automatic Transmission Fluid offers reliable wear protection.
For the four-wheel-drive models, the transfer case and rear differential require specialized gear lubrication. The transfer case holds 0.8 pints, while the rear differential holds 1.1 pints. The transfer case drain plug torque is 29 ft/lbs, and new gaskets are required for both the drain and fill plugs. To protect these components, we recommend the AMSOIL SEVERE GEAR® 75W-90 100% Synthetic Gear Lube. This advanced lubricant controls thermal runaway, protects against rust and corrosion, and reduces operating temperatures, extending the life of oil, seals, and equipment.
Cooling System and Brake Fluid Maintenance
Managing the temperature of the 2.4L turbo engine is vital for preventing knock and ensuring performance. The cooling system requires a total of 12.3 quarts for the engine and 2.9 quarts for the intercooler. AMSOIL offers two distinct antifreeze options for the Highlander. The AMSOIL Passenger Car & Light Truck Antifreeze & Coolant is a unique poly-organic acid (OAT) formulation that is phosphate-, nitrate-, nitrite-, silicate-, borate-, and amine-free. It comes as a 50/50 pre-mix and protects cooling system metals for up to 150,000 miles or 5 years.
For those who prefer to mix their own, the AMSOIL Propylene Glycol Antifreeze and Engine Coolant is a concentrated option that requires mixing with distilled water. This propylene glycol-based coolant significantly surpasses industry standards for metallic corrosion and erosion protection. Both options are compatible with all other antifreeze colors and protect all cooling system components.
Brake fluid is another critical safety fluid that often gets overlooked. The Highlander utilizes FMVSS116 DOT-3 or DOT-4 specifications. Using a 100% synthetic fluid ensures stable viscosity over a wide temperature range and excellent responsiveness for ABS and traction-control systems. The AMSOIL DOT 3 and DOT 4 100% Synthetic Brake Fluid is the recommended choice for maintaining safe stopping power and preventing moisture absorption.
For seasonal storage or long periods of inactivity, adding AMSOIL Gasoline Stabilizer can keep fuel fresh for up to 12 months, protecting against varnish and gum buildup. Additionally, AMSOIL P.i.® Performance Improver Gasoline Additive can restore up to 14% horsepower and clean GDI fuel injectors to a 100% flow rate after just one tank of fuel. These additives are particularly beneficial for the direct injection system found in the Highlander’s turbocharged engine.
About the Vehicle
The 2023 Toyota Highlander is a mid-size crossover SUV that continues to dominate its class as one of the most practical and reliable choices for families. Renowned for its versatility, the Highlander comfortably seats up to eight passengers in its three-row configuration, offering a spacious interior that balances utility with a refined driving experience. For the 2023 model year, Toyota introduced a new powertrain option with the introduction of the turbocharged 2.4-liter four-cylinder engine.
This 2.4-liter engine, designated as code T24A-FTS, represents a significant evolution from the previous naturally aspirated V6 options. By utilizing a turbocharger, Toyota has increased the power and torque output while maintaining excellent fuel economy. The turbocharger allows the Highlander to accelerate with surprising punch, making it competitive with larger engines in the segment while retaining the efficiency that SUV buyers demand. This engine is paired with a sophisticated 8-speed automatic transmission designed to shift smoothly under varying loads.
Manufactured in the United States, the Highlander has built a strong reputation for longevity and low cost of ownership. It serves as a daily driver for countless commuters while also being capable enough for weekend adventures, camping trips, and road travel. Its hybrid powertrain variant remains a popular choice for those seeking maximum efficiency, but the new turbo gasoline engine appeals to drivers who want a bit more performance without sacrificing the Highlander’s characteristic comfort and ride quality. The vehicle’s solid safety ratings and advanced driver-assistance features further cement its status as a top-tier family hauler.
Regular maintenance is the key to keeping this vehicle running smoothly for years to come. By adhering to recommended fluid intervals and using high-quality synthetic lubricants, owners can ensure the turbocharger and engine components remain protected against the unique stresses of turbocharged operation. Whether you are extending your oil change intervals for better value or simply want the best protection possible for your daily commute, the right fluids make all the difference in preserving the performance and reliability of your Highlander.