Keeping your 2018 Lincoln MKT running at its best starts with selecting the right lubricants for its powerful 3.7L V6 engine. Proper maintenance is the key to longevity, ensuring that every component from the engine block to the transmission receives the protection it needs to withstand the demands of daily driving and heavy towing.
Recommended AMSOIL Products
- AMSOIL Signature Series 5W-20 100% Synthetic Motor Oil – The top choice for maximum protection and extended drain intervals up to 25,000 miles.
- AMSOIL Extended-Life 5W-20 100% Synthetic Motor Oil – A versatile option providing up to 20,000 miles of protection with extra cleaning power.
- AMSOIL OE 5W-20 100% Synthetic Motor Oil – An economical synthetic choice that outperforms conventional oils and meets OEM requirements.
- AMSOIL 5W-20 100% Synthetic High-Mileage Motor Oil – Formulated specifically for vehicles with over 75,000 miles to reduce sludge and consumption.
- AMSOIL Oil Filter – Designed for superior filtration efficiency, capturing contaminants that can wear down engine parts.
- WIX XP Oil Filter – A premium aftermarket filter with media improvements over standard OEM-branded filters.
- WIX Oil Filter – A reliable filtration option that captures wear-causing contaminants to help extend engine life.
- WIX Air Filter – Premium media that improves airflow and filtration for better engine performance.
- AMSOIL Passenger Car & Light Truck Antifreeze & Coolant – A ready-to-use 50/50 pre-mix that protects cooling systems up to 150,000 miles.
- AMSOIL Propylene Glycol Antifreeze and Engine Coolant – A concentrated, non-toxic option for extended protection up to 150,000 miles.
- AMSOIL Signature Series Fuel-Efficient 100% Synthetic Automatic Transmission Fluid – Withstands heavy towing and high temperatures while improving fuel economy.
- AMSOIL OE Fuel-Efficient 100% Synthetic Automatic Transmission Fluid – Provides excellent wear protection for the transmission in a fuel-efficient formula.
- AMSOIL SEVERE GEAR® 75W-140 100% Synthetic Gear Lube – Ideal for the transfer case, controlling thermal runaway and protecting limited-slip differentials.
- AMSOIL SEVERE GEAR® 80W-90 100% Synthetic Gear Lube – Perfect for the rear differential, meeting Ford specifications for all-weather performance.
- AMSOIL SEVERE GEAR® 75W-90 100% Synthetic Gear Lube – A versatile gear lube that protects against rust and corrosion in demanding conditions.
- AMSOIL SEVERE GEAR® 75W-110 100% Synthetic Gear Lube – Offers advanced protection against wear and controls operating temperatures.
- AMSOIL DOT 3 and DOT 4 100% Synthetic Brake Fluid – Ensures excellent ABS responsiveness and stable viscosity across a wide temperature range.
- AMSOIL P.i.® Performance Improver Gasoline Additive – Restores lost horsepower and cleans fuel injectors for improved efficiency.
Proper lubrication is critical for the 2018 Lincoln MKT because its 3.7L V6 engine is a high-output powerplant that demands precise viscosity and superior thermal stability. The engine is designed to operate optimally with a 5W-20 viscosity rating, which ensures easy cold starts in extreme temperatures while maintaining a protective film at high operating temperatures. Using the correct oil grade is not just about meeting a specification; it is about ensuring that the oil pump can circulate fluid quickly when the engine is cold and that the oil does not thin out excessively under the stress of heavy loads or towing.
The engine oil capacity for a 2018 Lincoln MKT with the 3.7L engine is 6.0 quarts when the oil filter is also replaced. It is important to adhere to this capacity and to use the correct torque of 20 ft/lbs on the oil drain plug to prevent leaks or damage to the plug. After refilling, the oil level should always be checked to ensure it is within the safe operating range. For those living in areas where ambient temperatures drop below -30°C (-22°F), a 0W-20 viscosity meeting the WSS-M2C947-A specification may be used to improve cold-start performance further.
Filtering the oil is equally vital. The AMSOIL Oil Filter (EAO17) is designed to offer 99% filtration efficiency at 20 microns, capturing small contaminants that can cause wear. This filter provides greater capacity for holding contaminants compared to many competing filters, extending service life and protecting engine internals. Alternatively, the WIX XP Oil Filter or standard WIX Oil Filter are also compatible high-quality options that offer premium media improvements over original equipment manufacturer-branded filters.
Moving beyond the engine, the automatic transmission in the 2018 Lincoln MKT requires specific attention. The 6F55 and 6F50 transmissions are robust units, but they benefit significantly from synthetic fluids that can withstand the rigors of heavy towing and elevated temperatures. The Signature Series Fuel-Efficient ATF remains fluid in sub-zero conditions and provides reserve protection during heavy use. The OE Fuel-Efficient ATF is another excellent choice that offers protection against wear while meeting the demands of the transmission’s internal components. Whether you are navigating city traffic or pulling a trailer, these fluids help maintain smooth shifting and extend the life of the transmission.
The cooling system also plays a major role in the vehicle’s overall health. With a capacity of 13.2 quarts, the coolant system requires a high-quality antifreeze that protects against corrosion and boiling over. AMSOIL Passenger Car & Light Truck Antifreeze & Coolant is a unique poly-organic acid (OAT) formulation that is compatible with all other coolant colors and protects all cooling system metals, gaskets, and hoses. For those who prefer a concentrated option, the Propylene Glycol Antifreeze offers non-toxic protection with a service life of up to 150,000 miles or 5 years.
Finally, the differential and transfer case lubrication cannot be overlooked. The transfer case requires a specific SAE 75W-140 synthetic rear axle lubricant, which can be easily handled by the AMSOIL SEVERE GEAR 75W-140. This lube contains friction modifiers for limited-slip applications and helps control thermal runaway. The rear differential typically uses an 80W-90 viscosity, and the SEVERE GEAR 80W-90 or 75W-140 options provide the necessary protection against wear and corrosion. For the brake system, the AMSOIL DOT 3 and DOT 4 100% Synthetic Brake Fluid ensures stable performance and excellent responsiveness for the ABS and traction control systems.
Vehicle Background
The 2018 Lincoln MKT represents the final year of a unique segment in the automotive world. As a full-size luxury crossover SUV, it bridges the gap between a traditional station wagon and a body-on-frame SUV. It was built on the Ford D4 platform, which it shares with the Lincoln Town Car, making it one of the last of its kind in terms of size and body style. The MKT was designed to offer the comfort and prestige of the Lincoln brand with the practical utility of a large SUV, capable of seating up to seven passengers in a spacious and quiet cabin.
Under the hood, the 3.7L V6 engine (Engine Code [K]) delivers a solid 355 horsepower, providing ample power for a vehicle of its substantial size. This naturally aspirated engine is paired with a 6-speed automatic transmission, a reliable combination that balances performance with fuel efficiency. The MKT’s driving character is defined by a smooth, compliant ride that absorbs road imperfections with ease, making it a favored choice for long-distance travel and family road trips. Its all-wheel-drive system adds confidence in various weather conditions, further enhancing its appeal as a versatile family hauler.
Despite its robust engineering, the 2018 Lincoln MKT does face a few common issues that owners should be aware of. One known problem is the failure of the power transfer unit (PTU) bearing, which can lead to noisy operation or failure if the lubricant degrades. Using a high-quality synthetic gear lube specifically designed for this application can help mitigate this wear. Another potential issue involves the cooling system, where coolant leaks or premature thermostat failure can occur, making the use of a premium antifreeze crucial for maintaining optimal engine temperatures. Additionally, some owners have reported issues with the power steering pump, which can become noisy or fail, highlighting the importance of regular maintenance and fluid checks.
Furthermore, the MKT’s electronic components, including the transmission control module and various sensors, can sometimes experience glitches or failures. These electrical gremlins can be exacerbated by power surges or grounding issues. Ensuring that all fluids are of the highest quality can help reduce the strain on these systems. Lastly, while the 3.7L V6 is generally reliable, high mileage vehicles may experience increased oil consumption or sludge buildup if not maintained with the correct synthetic oils. Regular oil changes using high-performance synthetic motor oil can significantly reduce the risk of these engine-related problems, ensuring the vehicle continues to perform smoothly for years to come.
Ultimately, the 2018 Lincoln MKT is a vehicle that values comfort and capability. By using the recommended AMSOIL fluids, owners can ensure that this sophisticated machine receives the care it needs to maintain its luxury status and reliability. Whether it is the engine protection, transmission smoothness, or brake responsiveness, the correct lubricants are the foundation of a well-maintained vehicle. With proper care, the MKT remains a standout choice for those seeking a blend of space, luxury, and performance.