The 2018 Lincoln MKZ with the 2.0L EcoBoost engine is a sophisticated machine that demands the highest standard of fluid protection to maintain its performance and longevity. This turbocharged powertrain, along with the 6-speed automatic transmission, operates under significant thermal and mechanical stress that standard mineral fluids cannot adequately address. Utilizing specialized synthetic motor oil designed to withstand extreme temperatures, prevent turbocharger lag, and reduce internal friction ensures that the vehicle’s precise engineering is preserved for miles to come.
Recommended AMSOIL Products
For the 2018 Lincoln MKZ 2.0L engine, several synthetic motor oil options provide varying levels of protection and service intervals. The engine requires 5.7 quarts of fluid (with oil filter change) to ensure proper lubrication of all critical components.
- AMSOIL Signature Series 5W-30 100% Synthetic Motor Oil – Offers unsurpassed engine protection against horsepower loss and wear, capable of extending service intervals up to 25,000 miles. This oil specifically protects turbochargers 72% better than GM dexos1 Gen 2 requirements.
- AMSOIL Extended-Life 5W-30 100% Synthetic Motor Oil – Provides 37% more cleaning power to keep the engine running smoothly and delivers up to 20,000 miles of guaranteed protection, making it an excellent choice for extended drive cycles.
- AMSOIL OE 5W-30 100% Synthetic Motor Oil – A cost-effective synthetic option that fights sludge and deposits effectively, offering protection comparable to OEM standards for the 2.0L turbo engine.
- AMSOIL 5W-30 100% Synthetic High-Mileage Motor Oil – Formulated specifically for vehicles with over 75,000 miles, featuring enhanced detergents to reduce sludge and seals to minimize consumption.
- AMSOIL Oil Filter – Works in tandem with the oils to provide 99% filtering efficiency at 20 microns, capturing wear-causing contaminants that can shorten engine life.
In addition to engine oil, the cooling system requires attention to prevent overheating and corrosion. The 2018 MKZ holds 8.5 quarts of coolant, which can be serviced with a long-life formula designed to protect metal, gaskets, and hoses. For the transmission, the 6F35 unit is robust but benefits from a fluid that remains stable under heavy loads and high heat. The differential and transfer case lubricants are critical for the all-wheel-drive system, ensuring smooth power transfer and preventing the wear associated with thermal runaway in limited-slip applications.
Transmission and Cooling Fluids
The automatic transmission in the 2018 Lincoln MKZ is a 6-speed unit (6F35) that requires a full 9-quart fill for a total capacity change. While the factory fluid works, AMSOIL synthetic fluids offer superior stability and wear protection. AMSOIL Signature Series Fuel-Efficient 100% Synthetic Automatic Transmission Fluid is engineered to withstand the rigors of heavy towing, elevated temperatures, and challenging terrain. It remains fluid even in sub-zero conditions, ensuring quick shifts and reserve protection during extreme use. Alternatively, the AMSOIL OE Fuel-Efficient 100% Synthetic Automatic Transmission Fluid provides a strong balance of protection and value, designed to protect against wear while maintaining fuel efficiency.
The cooling system is the heart of the engine’s thermal management. Using the correct antifreeze is vital for the longevity of the 2.0L EcoBoost engine. AMSOIL Passenger Car & Light Truck Antifreeze & Coolant is a unique poly-organic acid (OAT) formulation that is compatible with all other coolant colors and contains no silicates or phosphates. It offers protection up to 150,000 miles or 5 years. For those seeking maximum concentration, AMSOIL Propylene Glycol Antifreeze and Engine Coolant provides protection up to 150,000 miles in passenger cars and is non-toxic, making it a safer option for the environment.
Gear Lubricants and Brake Fluid
For the Lincoln MKZ’s transfer case (PTU) and rear differential, specific synthetic gear lubes are required to meet Ford specifications. The transfer case requires 1.1 pints of SAE 75W-140 lubricant. AMSOIL SEVERE GEAR® 75W-140 100% Synthetic Gear Lube is the ideal choice, offering advanced protection against wear, controlling thermal runaway, and reducing operating temperatures. For the rear differential, which requires 80W-90 fluid (approx. 1.1 pints), AMSOIL SEVERE GEAR® 80W-90 100% Synthetic Gear Lube ensures smooth operation and prevents rust. AMSOIL SEVERE GEAR® 75W-90 and AMSOIL SEVERE GEAR® 75W-110 are also available for various heavy-duty applications if specific torque or load requirements differ from standard factory fill.
Braking performance is non-negotiable for safety. The 2018 MKZ utilizes a hydraulic brake system that benefits from the high dry and wet boiling points of synthetic fluid. AMSOIL DOT 3 and DOT 4 100% Synthetic Brake Fluid delivers excellent ABS and traction-control responsiveness. It maintains a stable viscosity over a wide temperature range, preventing the fade that can occur during heavy braking and ensuring consistent pedal feel in all conditions.
Fuel Economy and Engine Maintenance
To further optimize the performance of the 2.0L EcoBoost engine, the use of fuel additives can restore lost power and improve efficiency. AMSOIL P.i.® Performance Improver Gasoline Additive is a powerful solution that restores up to 14% horsepower and cleans GDI fuel injectors to 100% flow rate after just one tank. It helps prevent carbon buildup, a common issue in direct injection engines, and reduces the need for higher-octane fuel. For seasonal storage, AMSOIL Gasoline Stabilizer keeps fuel fresh for up to 12 months, protecting against varnish and ethanol corrosion.
Vehicle Background
The 2018 Lincoln MKZ represents the pinnacle of Ford’s luxury sedan line during its production run. Built on the Ford CD4 platform, which it shares with the Ford Fusion and Taurus, the MKZ distinguishes itself with a refined interior, quiet cabin, and a focus on a smooth, relaxing driving experience. The model line is known for blending the technological sophistication of the Ford brand with the upscale branding of Lincoln, offering features like adaptive cruise control, panoramic roofs, and a premium audio system even in standard trims.
The 2.0L EcoBoost engine is a standout feature of this vehicle. This turbocharged four-cylinder was designed to deliver power figures often associated with larger V6 engines while maintaining the fuel efficiency of a smaller engine. The 2018 model year continued to benefit from refinements made in previous years, resulting in improved responsiveness and reduced turbo lag. The engine produces roughly 240 horsepower in the base configuration, providing ample passing power on highways and confident acceleration in city traffic. When paired with the 6-speed automatic transmission, the MKZ offers a seamless shifting experience that complements the vehicle’s luxurious character.
Owners of the 2018 Lincoln MKZ often cite the vehicle’s comfort and quietness as primary reasons for ownership. The sound insulation is highly effective, making it one of the quieter sedans in its class. However, like any modern turbocharged engine, the 2.0L EcoBoost is sensitive to heat and requires fluids that can withstand the thermal stress generated by the turbocharger. Without the correct lubrication, the engine can suffer from issues such as oil coking in the turbocharger bearings, which leads to premature failure.
One of the most critical maintenance areas for this vehicle is addressing the potential for carbon buildup. Direct injection engines are prone to carbon accumulation on intake valves, which can lead to rough idling, misfires, and a loss of power over time. Using high-quality synthetic motor oils with effective detergents, such as AMSOIL, helps mitigate this issue by keeping the combustion chamber cleaner. Another common concern is the transfer case on the all-wheel-drive models. The PTU (Power Transfer Unit) is known to run hot, and standard fluids can break down, leading to premature wear. Switching to a high-performance synthetic gear lube like AMSOIL SEVERE GEAR can significantly reduce operating temperatures and extend the life of the transfer case.
Additionally, the high-performance nature of the 2.0L turbo engine makes it susceptible to Low-Speed Pre-Ignition (LSPI) in certain driving conditions, particularly when accelerating under heavy load. Modern engine oils must be formulated to resist LSPI events to prevent catastrophic engine damage. The AMSOIL formulations recommended for this vehicle are tested to fight these harmful events, ensuring the longevity of the pistons and cylinder walls. Furthermore, as the vehicle accumulates mileage, oil consumption can become a factor. The AMSOIL High-Mileage formulation includes seal conditioners to help reduce consumption and prevent leaks, keeping the engine running smoothly as it ages.
Ultimately, the 2018 Lincoln MKZ is a vehicle that rewards proactive and knowledgeable maintenance. By selecting the fluids specified for its high-performance engine and transmission, owners can ensure that their Lincoln continues to deliver the smooth, powerful, and luxurious ride that the brand is famous for, well beyond the recommended service intervals of the average driver.