Maintaining your 2018 Ford E350 VAN with the 6.8L 10-cylinder engine requires precise attention to fluid specifications and filter compatibility. This robust workhorse is designed for heavy-duty hauling and demanding commercial or personal use, making the quality of lubricants critical for longevity. Proper fluids ensure the engine can handle extreme loads, maintain peak performance in varying temperatures, and reduce the frequency of wear-related repairs. Choosing the right lubricants from AMSOIL can help preserve the vehicle’s capabilities for years of reliable service.
Recommended AMSOIL Products
For the 6.8L 10-cylinder engine, AMSOIL offers several high-performance options tailored to different driving profiles and maintenance needs. The engine requires 6 quarts of 5W-30 motor oil when combined with a filter change.
- AMSOIL Signature Series 5W-30 100% Synthetic Motor Oil – Delivers unmatched protection against horsepower loss and wear, with a guaranteed service interval of up to 25,000 miles or one year.
- AMSOIL Extended-Life 5W-30 100% Synthetic Motor Oil – Provides extended protection up to 20,000 miles, offering superior cleaning power to help keep the engine running smoothly over the long haul.
- AMSOIL OE 5W-30 100% Synthetic Motor Oil – Fights sludge and deposits effectively, offering a cost-effective solution that performs better than conventional oils while meeting original equipment standards.
- AMSOIL 5W-30 100% Synthetic High-Mileage Motor Oil – Specifically formulated for vehicles with over 75,000 miles, featuring enhanced additives to reduce sludge and improve performance in older engines.
- AMSOIL Oil Filter – Ensures 99% filtration efficiency at 20 microns, allowing lower restriction to keep engine parts lubricated and providing greater capacity for contaminants than standard filters.
- WIX XP Oil Filter – A premium filter option that offers improvements over original equipment manufacturer-branded filters, suitable for those seeking a reliable alternative.
- WIX Oil Filter – Features premium media for effective filtration, providing a solid choice for standard oil change intervals.
Engine and Cooling System Maintenance
The cooling system in the 2018 Ford E350 VAN is vital for managing the thermal load of the 6.8L engine, especially during heavy towing or in hot climates. Using a high-quality antifreeze ensures that the engine stays within safe operating temperatures. AMSOIL Passenger Car & Light Truck Antifreeze & Coolant is engineered to exceed OEM requirements, offering protection for up to 150,000 miles or five years. It utilizes a unique poly-organic acid (OAT) formulation compatible with a wide variety of vehicles and protects all cooling system metals, gaskets, and hoses. For those who prefer a concentrated formula that can be mixed with distilled water to exact specifications, the AMSOIL Propylene Glycol Antifreeze and Engine Coolant offers robust protection, safeguarding against metallic corrosion and erosion for up to 150,000 miles in passenger cars and light trucks.
Transmission and Drivetrain Protection
The automatic transmission in this vehicle, specifically the 6-speed 6R140, faces significant stress. Whether you are navigating city traffic or towing a heavy load, the fluid must resist thermal breakdown and maintain proper viscosity. AMSOIL Signature Series Fuel-Efficient 100% Synthetic Automatic Transmission Fluid is designed to withstand the rigors of heavy towing and elevated temperatures while remaining fluid in sub-zero conditions. It provides reserve protection during heavy use and abuse. Alternatively, the AMSOIL OE Fuel-Efficient 100% Synthetic Automatic Transmission Fluid offers reliable wear protection for daily driving needs. This transmission requires a total fill of 17.4 quarts, though the initial fill capacity is 10 quarts.
The rear differential also requires specific attention, particularly regarding friction modifiers for limited-slip differentials. If your E350 is equipped with an M70FF axle featuring a limited-slip differential, it contains carbon-fiber clutch discs that require specialized lubrication. The AMSOIL SEVERE GEAR 75W-90 100% Synthetic Gear Lube is an excellent choice, as it contains necessary friction modifiers and helps control thermal runaway while protecting against rust and corrosion. This fluid is ideal for heavy-duty applications and ensures long oil, seal, and equipment life. For standard rear differentials without limited-slip components, the AMSOIL SEVERE GEAR 80W-90 100% Synthetic Gear Lube is appropriate. It provides advanced wear protection and helps reduce operating temperatures, contributing to the longevity of the differential gears.
Brake Fluid and Seasonal Care
Safe stopping power is paramount for a vehicle of this size. The recommended brake fluid for the 2018 Ford E350 VAN must meet specific DOT specifications, such as Motorcraft DOT 4 LV High Performance Brake Fluid. AMSOIL DOT 3 and DOT 4 100% Synthetic Brake Fluid ensures excellent ABS and traction-control responsiveness while providing a stable viscosity across a wide temperature range. This stability is crucial for maintaining consistent brake pedal feel under various driving conditions.
For owners who may store the vehicle during off-seasons or periods of inactivity, preventative care is essential. The AMSOIL Gasoline Stabilizer helps keep fuel fresh for up to 12 months, protecting against varnish and gum buildup, which is particularly important for ethanol-blended fuels. Additionally, the AMSOIL Engine Fogging Oil is highly effective for protecting internal engine components from rust during storage, ensuring the engine starts smoothly when needed again.
Performance Enhancers and Cleaners
To maximize the efficiency and performance of the 6.8L engine, fuel system maintenance plays a key role. The AMSOIL P.i. Performance Improver Gasoline Additive works to restore up to 14% horsepower and cleans GDI fuel injectors to 100% flow rate after just one tank of treated fuel. This additive also improves fuel economy and helps prevent carbon buildup and pre-ignition knock. For further upper cylinder protection, the AMSOIL Upper Cylinder Lubricant Corrosion Inhibitor lubricates the fuel system and upper cylinders, adding a layer of protection for the engine’s internal components.
Vehicle Background
Model History and Performance
The 2018 Ford E350 Van is a staple in the commercial and recreational vehicle market, renowned for its durability and utility. Built on the Ford F-53 chassis, which itself has roots in the Ford F-Series, the E350 represents the pinnacle of American full-size vans. This platform is designed for heavy-duty applications, including shuttle buses, campers, and cargo transport. The vehicle is available with various engine options, but the 6.8L V10 engine is a standout for its torque and reliability, making it a preferred choice for those who prioritize power over fuel efficiency.
This model year continues the legacy of the E-Series, which has been in production since the 1960s. Known for their robust construction, E350 vans are often used by law enforcement, emergency services, and businesses that require a reliable transport solution. The interior space is vast, capable of accommodating large passenger loads or substantial cargo volumes. While the exterior design may appear utilitarian compared to more modern crossovers, the E350’s body-on-frame construction provides a level of strength that unibody vehicles cannot match.
Common Issues and AMSOIL Solutions
Despite its rugged reputation, the 2018 Ford E350 VAN can experience specific issues that are exacerbated by high mileage and heavy loads. One common concern is the buildup of carbon deposits on intake valves and fuel injectors, which can lead to reduced fuel economy and rough idling. Regular use of AMSOIL P.i. Performance Improver can help mitigate this by keeping the fuel system clean and maintaining optimal injector flow rates.
Another frequent issue involves overheating, particularly during hot weather or when towing. Over time, the cooling system can accumulate sludge and scale, reducing heat transfer efficiency. Switching to AMSOIL Antifreeze & Coolant can help maintain optimal cooling system health, preventing overheating and extending the life of hoses and gaskets. Furthermore, the E350’s automatic transmission is subject to thermal stress, which can lead to fluid degradation and slipping if not serviced with high-quality synthetic fluid. Using AMSOIL’s Signature Series Fuel-Efficient 100% Synthetic Automatic Transmission Fluid helps prevent this thermal breakdown, ensuring smooth shifts and protecting transmission components from wear.
Finally, the rear differential in models with limited-slip differentials can suffer from clutch shudder or failure if the gear oil does not contain the correct friction modifiers. Using AMSOIL SEVERE GEAR 75W-90 100% Synthetic Gear Lube ensures that the limited-slip clutch packs receive the specific lubrication they require, preventing shudder and extending the life of the differential. By addressing these common pain points with premium synthetic lubricants, owners can keep their E350 Vans performing at their peak for years to come.