The 2018 Lincoln MKX equipped with the 2.7-liter twin-turbo V6 is a sophisticated crossover that demands precision in its maintenance. This engine, known for its blend of performance and efficiency, operates under higher thermal and mechanical stresses than standard naturally aspirated engines. Turbocharged powertrains generate significant heat, which can break down conventional lubricants faster. To maintain the longevity of the engine’s turbocharger bearings, reduce carbon buildup, and ensure optimal fuel economy, selecting the correct 100% synthetic lubricants is not just a recommendation but a necessity for this specific powerplant.
Recommended AMSOIL Products
- AMSOIL Signature Series 5W-30 100% Synthetic Motor Oil – Offers unsurpassed protection against wear and horsepower loss, with a guaranteed interval of up to 25,000 miles or one year.
- AMSOIL Extended-Life 5W-30 100% Synthetic Motor Oil – Provides a balance of cleaning power and extended performance, guaranteeing 20,000 miles of protection between changes.
- AMSOIL OE 5W-30 100% Synthetic Motor Oil – A cost-effective option that fights sludge and deposits, meeting original equipment performance requirements.
- AMSOIL 5W-30 100% Synthetic High-Mileage Motor Oil – Specifically formulated with boosted detergents and anti-wear additives for engines exceeding 75,000 miles.
- AMSOIL Oil Filter – Delivers 99% filtration efficiency at 20 microns to trap harmful contaminants and reduce engine wear.
- WIX Oil Filter – A premium media filter that offers improvements over standard OEM-branded replacements.
- AMSOIL Signature Series Fuel-Efficient 100% Synthetic Automatic Transmission Fluid – Withstands heavy towing, elevated temperatures, and provides reserve protection for the 6F55 transmission.
- AMSOIL OE Fuel-Efficient 100% Synthetic Automatic Transmission Fluid – Protects against wear and meets the performance standards required for this vehicle’s transmission.
- AMSOIL Passenger Car & Light Truck Antifreeze & Coolant – A 50/50 pre-mix formulation that protects cooling system metals and hoses for up to 150,000 miles.
- AMSOIL SEVERE GEAR® 75W-140 100% Synthetic Gear Lube – Ideal for the transfer case, providing advanced wear protection and controlling thermal runaway.
- AMSOIL SEVERE GEAR® 80W-90 100% Synthetic Gear Lube – Recommended for the rear differential, meeting Ford specifications for reliable lubrication.
- AMSOIL DOT 3 and DOT 4 100% Synthetic Brake Fluid – Ensures stable viscosity and excellent ABS responsiveness across a wide temperature range.
Understanding the specific fluid requirements for this vehicle is the first step in extending its service life. The engine oil capacity for the 2018 Lincoln MKX with the 2.7L 6-cylinder engine is 6.0 quarts, including the oil filter. After refilling, it is crucial to check the oil level to ensure it is within the safe operating range. This turbocharged engine benefits immensely from the thermal stability of AMSOIL synthetic motor oils, which resist breakdown better than conventional oils under the intense heat generated by the turbos. For owners of vehicles with over 75,000 miles, the high-mileage formula includes enhanced detergents to clean existing deposits while preventing new sludge formation.
When it comes to the automatic transmission, which uses the 6F55 unit, capacity for a total fill is 11 quarts. While the engine oil protects the powertrain, the transmission fluid ensures smooth shifting and protects against the wear caused by the high torque output of the 2.7L engine. AMSOIL transmission fluids are designed to withstand the rigors of heavy towing and elevated temperatures, maintaining fluidity even in sub-zero conditions. This helps prevent the harsh shifting and sludge buildup that can lead to expensive transmission repairs. The fuel-efficient formulations also contribute to maximizing the vehicle’s overall fuel economy, a key consideration for crossover owners.
The cooling system requires a specific amount of antifreeze to function correctly, with a capacity of 10.6 quarts for the 2018 MKX. Maintaining the coolant system is vital for preventing overheating, which can be a critical issue for turbocharged engines. AMSOIL antifreeze and coolants are engineered to exceed original equipment manufacturer requirements, protecting all cooling system metals, gaskets, and hoses. Whether you choose the ready-to-use pre-mix or the concentrated propylene glycol formula, both offer protection for up to 150,000 miles or five years, significantly reducing the frequency of coolant flushes.
Beyond the engine and transmission, the drivetrain components require specialized lubrication. The transfer case for this All-Wheel Drive model requires SAE 75W-140 synthetic rear axle lubricant to meet Ford specifications. AMSOIL SEVERE GEAR® 75W-140 provides advanced protection against wear and helps reduce operating temperatures. For the rear differential, which uses SAE 80W-90, AMSOIL SEVERE GEAR® 80W-90 offers long oil and seal life while containing friction modifiers for limited-slip applications. The brake fluid should be replaced with a high-performance synthetic option like AMSOIL DOT 3 and DOT 4 to ensure consistent braking power, especially under heavy loads or in wet conditions.
About the Vehicle
The 2018 Lincoln MKX represents a peak in the brand’s mid-size luxury crossover lineup, designed to compete directly with high-end competitors like the Acura MDX and the Cadillac XT5. Powered by the 2.7-liter EcoBoost V6, this model delivers a robust powertrain that combines the smooth refinement expected from a Lincoln with genuine performance capabilities. The engine produces substantial horsepower and torque, making the MKX a spirited driver’s vehicle that feels capable of handling steep inclines, highway merging, and towing light trailers with ease. The vehicle’s platform, based on the Ford Fusion and Edge, offers a refined ride quality, utilizing a sophisticated independent suspension system that balances comfort with handling dynamics.
Owners of the 2018 MKX often appreciate the vehicle’s blend of premium interior materials, spacious cabin, and advanced technology features. The cabin is designed with a focus on quietness and comfort, utilizing acoustic laminated glass and sound-deadening materials to create a sanctuary on wheels. However, the 2.7-liter EcoBoost engine, while powerful, has been known to present specific maintenance challenges that diligent owners must address. One common issue reported by owners involves carbon buildup on the intake valves, a characteristic of direct injection gasoline engines. Over time, this accumulation can affect air flow and engine efficiency. Regular use of high-quality synthetic motor oils helps mitigate deposit formation, and using fuel additives like AMSOIL P.i. Performance Improver can restore fuel injector flow and help reduce carbon buildup on injectors and combustion chambers.
Another area of concern for some MKX owners involves the cooling system. Because the engine operates at high temperatures, the cooling system is under constant stress. Over time, coolant can degrade, leading to corrosion or reduced boiling points. This can potentially lead to overheating, which is particularly dangerous for turbocharged components. Using a high-performance synthetic antifreeze ensures that the fluid maintains its protective properties over a longer period, safeguarding the engine and turbocharger from thermal shock and corrosion.
Turbocharger health is also a primary consideration for this model. The high speeds and heat involved in turbo operation place significant stress on the bearings and seals. Failure to use the correct oil can lead to premature turbo failure, a costly repair. The oil changes must be performed diligently to ensure that the turbocharger remains lubricated and cool. Additionally, while the 6-speed automatic transmission is generally reliable, the transmission fluid can degrade under severe driving conditions. Owners who frequently tow or drive in stop-and-go traffic should monitor transmission fluid condition closely. Synthetic transmission fluid resists oxidation and thermal breakdown better than conventional fluids, ensuring smoother shifts and extended transmission life.
Finally, the All-Wheel Drive system in the MKX relies on the transfer case and rear differential to distribute power effectively. These components are subject to high torque loads and varying road conditions. Using the correct gear lube is essential to prevent wear on the gears and bearings. The transfer case, in particular, requires a specific viscosity to operate correctly under the varying loads of an AWD system. By selecting the appropriate AMSOIL gear lube, owners can ensure that these components remain protected, reducing the risk of noise or failure. Regular maintenance with premium synthetic oils and fluids is the most effective way to keep the 2018 Lincoln MKX performing at its best, ensuring that this luxury crossover continues to provide a premium driving experience for years to come.
“`