The 2018 Ford Fusion 2.0L EcoBoost engine is a sophisticated piece of engineering that delivers impressive performance and fuel economy. However, this turbocharged powerplant places specific demands on its lubrication systems that standard fluids often struggle to meet. Proper maintenance is critical for preserving the turbocharger’s longevity, managing high operating temperatures, and ensuring the 6-speed automatic transmission shifts smoothly. Using high-quality synthetic lubricants formulated for the extreme conditions modern engines face is the most effective way to maintain peak performance and extend the service life of your vehicle.
Recommended AMSOIL Products
- AMSOIL Signature Series 5W-30 100% Synthetic Motor Oil – Provides unsurpassed engine protection against horsepower loss and wear for up to 25,000 miles, ideal for the high stress of turbocharging.
- AMSOIL Extended-Life 5W-30 100% Synthetic Motor Oil – Offers extended change intervals of up to 20,000 miles with superior cleaning power to keep the engine running smoothly.
- AMSOIL OE 5W-30 100% Synthetic Motor Oil – A cost-effective synthetic option that fights sludge and deposits while protecting turbochargers effectively.
- AMSOIL 5W-30 100% Synthetic High-Mileage Motor Oil – Specifically formulated for vehicles with over 75,000 miles to reduce oil consumption and sludge.
- AMSOIL Oil Filter – Delivers 99% filtration efficiency at 20 microns with greater capacity to trap wear-causing contaminants, extending engine life.
- WIX Oil Filter – Features premium media that offers performance improvements over standard OEM-branded filters.
- AMSOIL Signature Series Fuel-Efficient 100% Synthetic Automatic Transmission Fluid – Withstands heavy towing, elevated temperatures, and challenging terrain while maintaining fluidity in sub-zero conditions.
- AMSOIL OE Fuel-Efficient 100% Synthetic Automatic Transmission Fluid – A reliable synthetic fluid that protects against transmission wear.
- AMSOIL SEVERE GEAR® 75W-140 100% Synthetic Gear Lube – Recommended for the power transfer unit to control thermal runaway and reduce operating temperatures.
- AMSOIL SEVERE GEAR® 80W-90 100% Synthetic Gear Lube – The specified lubricant for the rear differential, meeting Ford specifications for all temperatures.
- AMSOIL Passenger Car & Light Truck Antifreeze & Coolant – An ethylene glycol 50/50 pre-mix that protects all cooling system metals, gaskets, and hoses for up to 150,000 miles.
- 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.
Ensuring your 2018 Ford Fusion is filled with the correct fluid capacities and types is essential for its operation. The engine requires 5.7 quarts of oil, including the filter change. When refilling, always check the oil level after the process is complete. The cooling system has a substantial capacity of 8.5 quarts. For the automatic transmission, capacities vary depending on the specific transmission model; the 6-speed 6F55 requires a total fill of 11.6 quarts, while the 6F35 requires 9 quarts. The transfer case is smaller, holding just 0.8 pints, and the rear differential holds 2.4 pints. Following these exact measurements and using the recommended AMSOIL products helps prevent overheating, reduces wear, and ensures the powertrain operates exactly as Ford intended, but with superior protection against the harsh realities of daily driving.
For owners looking to maximize the longevity of their vehicle’s powertrain, starting with the best motor oil is the most critical step. The 2.0L EcoBoost engine features a turbocharger that spins at incredibly high speeds, generating significant heat. Standard oils can break down under this thermal stress, leading to sludge, varnish, and potential turbocharger failure. AMSOIL Signature Series 5W-30 100% Synthetic Motor Oil is engineered to provide 75% more engine protection against horsepower loss and wear. It maintains viscosity in extreme temperatures and offers guaranteed protection for up to 25,000 miles, allowing you to extend your maintenance intervals significantly. If you prefer a slightly shorter interval but still want synthetic benefits, AMSOIL Extended-Life 5W-30 offers 20,000 miles of protection with 37% more cleaning power to keep the engine running smoother for longer. For those on a budget who still demand synthetic performance, AMSOIL OE 5W-30 fights sludge and deposits effectively. If your Ford Fusion has more than 75,000 miles, AMSOIL 5W-30 100% Synthetic High-Mileage Motor Oil is an excellent choice, featuring enhanced anti-wear additives and a boosted detergent package to clean the engine.
Matching the motor oil with a high-efficiency filter is just as important as the oil itself. The AMSOIL Oil Filter is designed to work in tandem with AMSOIL motor oils, providing 99% filtration efficiency at 20 microns. This high filtration rate captures small, wear-causing contaminants that standard filters might let pass, keeping engine parts lubricated and clean. It also offers extended service life, matching the long intervals of synthetic oil. Alternatively, the WIX Oil Filter features premium media that offers improvements over original equipment manufacturer-branded filters, making it a solid choice for those who prefer established aftermarket brands.
Transmission health is another area where synthetic fluid provides a tangible advantage. The Ford Fusion’s 6-speed automatic transmission (6F55 or 6F35) is engineered for efficiency and performance, but it can suffer from wear and fluid breakdown under stress. AMSOIL Signature Series Fuel-Efficient 100% Synthetic Automatic Transmission Fluid withstands the rigors of heavy towing, elevated temperatures, and challenging terrain. It remains fluid in sub-zero temperatures and provides reserve protection during heavy use, ensuring smooth shifts regardless of the driving conditions. For a more budget-friendly option that still delivers full synthetic performance, AMSOIL OE Fuel-Efficient 100% Synthetic Automatic Transmission Fluid protects against wear and extends the life of the transmission components.
Moving to the drivetrain, the 2018 Ford Fusion with the 2.0L engine often utilizes a power transfer unit (PTU) and a rear differential. These components operate under extreme pressure and generate significant heat. For the PTU, AMSOIL SEVERE GEAR® 75W-140 100% Synthetic Gear Lube is the recommended specification. It controls thermal runaway, protects against rust and corrosion, and helps reduce operating temperatures, which is vital for the longevity of this component. The rear differential requires an SAE 80W-90 fluid meeting Ford specification WSP-M2C197-A. AMSOIL SEVERE GEAR® 80W-90 meets this requirement, offering advanced protection against wear and containing friction modifiers for limited-slip applications. Other grades like 75W-90 and 75W-110 are also available for specific needs or future modifications.
Cooling system maintenance is critical for a turbocharged engine. The 2018 Fusion requires a capacity of 8.5 quarts of coolant. AMSOIL Passenger Car & Light Truck Antifreeze & Coolant is an ethylene glycol 50/50 pre-mix that protects all cooling system metals, gaskets, and hoses. It is free of phosphates, nitrates, nitrites, silicates, borates, and amines, making it compatible with a wide variety of vehicle systems and safe for use in aluminum components. For those who prefer a concentrated formula to mix with distilled water, AMSOIL Propylene Glycol Antifreeze and Engine Coolant offers protection up to 150,000 miles or 5 years. It greatly surpasses standards for metallic corrosion and erosion, ensuring the cooling system operates efficiently.
Finally, safety-critical fluids like brake fluid should not be overlooked. The 2018 Ford Fusion requires a fluid meeting WSS-M6C65-A2 or ISO 4925 class 6 standards. AMSOIL DOT 3 and DOT 4 100% Synthetic Brake Fluid provides excellent ABS and traction-control responsiveness. Its stable viscosity over a wide temperature range ensures consistent braking performance in both hot and cold conditions. By maintaining all these fluid systems with top-tier synthetic products, you ensure that your vehicle is protected against wear, corrosion, and performance degradation.
Vehicle Background
The 2018 Ford Fusion represents a significant evolution in the mid-size sedan segment, blending sporty handling with advanced technology and efficiency. Built on Ford’s CD4 platform, which it shares with the Lincoln MKZ and the Ford Mustang, the Fusion is known for its refined ride quality and competitive fuel economy. The specific model in focus, the 2.0L EcoBoost, is a turbocharged four-cylinder engine that produces a robust 240 horsepower and 270 lb-ft of torque. This powertrain strikes a balance between the spirited acceleration expected of a performance-oriented sedan and the fuel efficiency that makes it a practical daily driver. The engine is paired with a smooth 6-speed automatic transmission, which works seamlessly with the engine’s power delivery to provide a responsive driving experience.
Owners of the 2018 Ford Fusion often appreciate its versatile nature. It competes directly with the Toyota Camry, Honda Accord, and Hyundai Sonata but distinguishes itself with a more engaging driving dynamic. The interior is designed with a focus on the driver, featuring the SYNC 3 infotainment system that supports Apple CarPlay and Android Auto, making connectivity a standard feature. The cabin is spacious, offering comfortable seating for five adults, and the trunk provides ample cargo space for everyday needs. From a market perspective, the Fusion solidified Ford’s position in the highly competitive North American mid-size sedan market during its production run.
While the 2018 Ford Fusion is a reliable and capable vehicle, certain issues can arise over time, particularly with the EcoBoost engine. One common concern among owners is the potential for spark plug fouling or carbon buildup on the intake valves due to direct injection and turbocharging. Using high-quality synthetic oils like AMSOIL Signature Series can help mitigate carbon deposits and keep the fuel injectors cleaner, addressing this issue proactively. Another prevalent problem is turbocharger failure, often linked to oil starvation or oil coking at high temperatures. The robust protection offered by synthetic motor oils against wear and high-temperature breakdown is a key defense against premature turbocharger wear. Additionally, the 6-speed automatic transmission can sometimes develop shuddering or rough shifting if the fluid breaks down or becomes contaminated. Regularly changing the transmission fluid with a high-performance synthetic like AMSOIL Signature Series ATF can smooth out shifts and prevent costly transmission repairs. Finally, some owners have reported issues with the power transfer unit in AWD models, which can suffer from premature failure if the lubricant overheats. Using the recommended AMSOIL SEVERE GEAR® 75W-140 provides superior thermal stability, helping to keep the unit within safe operating temperatures and extending its service life. By addressing these specific areas with premium lubricants, owners can enjoy the full potential of their vehicle for years to come.