The 2018 Ford F-150 equipped with the 5.0L V8 engine is a robust workhorse designed for both heavy-duty tasks and daily driving comfort. Ensuring this powerplant receives the correct lubrication is essential for maintaining its reliability, performance, and longevity. Proper fluid selection protects critical components from wear, reduces operating temperatures, and helps extend service intervals significantly compared to conventional lubricants.
Recommended AMSOIL Products
- AMSOIL Signature Series 5W-20 100% Synthetic Motor Oil – Provides the highest level of protection with extended drain intervals up to 25,000 miles, offering superior resistance to heat and wear for the 5.0L V8.
- AMSOIL Extended-Life 5W-20 100% Synthetic Motor Oil – Delivers 20,000 miles of protection with enhanced cleaning power to keep the engine running smoother and reduce deposit buildup.
- AMSOIL OE 5W-20 100% Synthetic Motor Oil – A cost-effective full synthetic option that exceeds OEM standards, fighting sludge and deposits while maintaining excellent engine cleanliness.
- AMSOIL 5W-20 100% Synthetic High-Mileage Motor Oil – Formulated specifically for engines with over 75,000 miles to reduce leaks and consumption while boosting detergency and cleaning power.
- AMSOIL Oil Filter – Features premium filtering efficiency of 99 percent at 20 microns to remove wear-causing contaminants and allows for lower restriction to keep engine parts properly lubricated.
- WIX XP Oil Filter – Offers premium media that outperforms original equipment manufacturer branded filters, ensuring maximum contamination control.
- WIX Oil Filter – A reliable OEM-style replacement featuring premium media for improved filtration performance.
- WIX Air Filter – Protects the engine with premium filtration media that offers improvements over original equipment manufacturer-branded filters.
- AMSOIL Passenger Car & Light Truck Antifreeze & Coolant – A unique OAT formulation providing up to 150,000 miles of protection, safe for all cooling system metals and hoses.
- AMSOIL Propylene Glycol Antifreeze and Engine Coolant – A concentrated formula offering exceptional corrosion and erosion protection for up to 150,000 miles or 5 years.
- AMSOIL Signature Series ULV 100% Synthetic Automatic Transmission Fluid – Specifically engineered for the 10R80 transmission, withstanding towing, heat, and extreme terrain while remaining fluid in sub-zero temperatures.
- AMSOIL Signature Series Fuel-Efficient 100% Synthetic Automatic Transmission Fluid – Designed to reduce friction and improve fuel economy while protecting against wear in severe service conditions.
- AMSOIL OE Fuel-Efficient 100% Synthetic Automatic Transmission Fluid – A fuel-efficient formula that provides strong protection against wear, meeting OEM requirements for extended drain intervals.
- AMSOIL SEVERE GEAR® 75W-85 100% Synthetic Gear Lube – Essential for the front and rear differentials, this lube controls thermal runaway and protects against rust and corrosion for long equipment life.
- 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.
The 5.0L Ti-VCT V8 engine in the 2018 F-150 requires a viscosity grade of 5W-20 to operate correctly. The engine oil capacity is 8.8 quarts, including the filter. Using a full synthetic motor oil like AMSOIL Signature Series 5W-20 100% Synthetic Motor Oil allows you to extend your drain intervals significantly, ensuring the engine remains clean and well-lubricated regardless of whether you are tackling off-road trails or commuting on highways. For engines exceeding 75,000 miles, the AMSOIL 5W-20 100% Synthetic High-Mileage Motor Oil is recommended to address potential leak issues and consumption.
Beyond the crankcase, the cooling system requires attention to prevent overheating, which is a common concern in heavy-duty applications. The AMSOIL Passenger Car & Light Truck Antifreeze & Coolant capacity for this model is 13.8 quarts. AMSOIL offers both pre-mix and concentrated antifreeze options that provide superior corrosion protection compared to standard green coolants, helping to preserve the integrity of aluminum components and seals within the cooling system. This protection is vital for maintaining optimal engine temperature under heavy loads.
The 2018 F-150 5.0L is paired with the 10R80 10-speed automatic transmission. This complex gearbox benefits greatly from synthetic fluid designed to handle high torque and heat. The total fill capacity is 13.1 quarts, while an initial fill requires 5.1 quarts. AMSOIL’s Signature Series ULV 100% Synthetic Automatic Transmission Fluid is specifically formulated for this transmission, offering enhanced protection against shudder and harsh shifting while maintaining fluidity in extreme cold. For those seeking fuel economy benefits, the AMSOIL Signature Series Fuel-Efficient 100% Synthetic Automatic Transmission Fluid is also a top-tier choice.
Differential and transfer case lubrication is equally critical for 4×4 models. The front differential requires 3.6 pints of 75W-85 synthetic AMSOIL SEVERE GEAR® 75W-85 100% Synthetic Gear Lube, while the rear differential with a 9.75-inch ring gear needs 5.5 pints. Transfer cases require 3 pints of lubricant as well. Using a synthetic gear lube like AMSOIL SEVERE GEAR ensures that gears are protected from scuffing and thermal runaway, extending the life of the axles and transfer components significantly.
Vehicle Background
The 2018 model year represents a significant point in the evolution of the Ford F-150, marking the ninth generation of the best-selling truck in America. Built on the lightweight aluminum-alloy body, this iteration continues to balance rugged capability with everyday drivability, a combination that has kept the F-150 at the top of the sales charts for decades. The 5.0L Ti-VCT V8 engine remains a popular choice for buyers who want the smooth power delivery and torque curve of a naturally aspirated V8, often serving as the heart of the truck for those who do not require the maximum towing capacity of the twin-turbo V6 or EcoBoost options.
Owners of the 2018 F-150 with the 5.0L engine generally praise its refined ride quality and reliability. The truck is known for its versatility, capable of hauling heavy payloads in the bed while providing a comfortable cabin for family transport. The 10-speed automatic transmission, introduced in the 2017 model year and carried over to 2018, allows for smooth acceleration and improved fuel efficiency, keeping the engine in its optimal power band whether towing a trailer or cruising on the interstate. The platform is widely respected for its durability, with the F-150 line serving as the backbone of American productivity for over a century.
While the 2018 F-150 is a reliable vehicle, there are specific issues that owners often encounter, which can be mitigated through the use of high-quality synthetic lubricants. One common area of concern involves the 10-speed transmission. Like many modern automatic transmissions, it can occasionally experience shudder or harsh shifting, particularly if the fluid degrades or becomes contaminated. Switching to a premium synthetic transmission fluid like AMSOIL Signature Series ULV 100% Synthetic Automatic Transmission Fluid can help smooth out these shifts and protect the clutches and bands from premature wear.
Another issue often noted by owners of high-mileage F-150s is valve cover gasket leaks. The engine’s design can lead to oil seeping from the valve covers as the vehicle ages. Using a high-mileage motor oil formulated with seal conditioners, such as the AMSOIL 5W-20 100% Synthetic High-Mileage Motor Oil, can help swell and maintain the elasticity of these seals, potentially slowing or stopping minor leaks and reducing oil consumption. This proactive maintenance approach can extend the time between costly repairs and keep the engine bay cleaner.
Carbon buildup on intake valves and fuel injectors is a known challenge for modern gasoline engines, including the 5.0L, due to direct injection characteristics and variable valve timing systems. Over time, this buildup can restrict airflow and reduce engine efficiency. Regular use of a fuel system cleaner like AMSOIL P.i.® Performance Improver Gasoline Additive can help mitigate this accumulation, restoring horsepower and fuel economy to their optimal levels.
Finally, the cooling system is a critical point of maintenance for the 2018 F-150. Aluminum cooling components can be susceptible to corrosion and erosion over time, especially if the AMSOIL Propylene Glycol Antifreeze and Engine Coolant is not changed regularly or if an incompatible coolant is used. This can lead to leaks and eventual radiator failure. Using a high-performance antifreeze like AMSOIL, which is free of silicates and other abrasive additives, ensures that the cooling system remains free of sludge and corrosion, protecting the radiator and engine block from thermal stress and failure.