The 1987 Ford F250 equipped with the 5.0L V8 engine is a vehicle that combines rugged durability with a relatively compact powerplant. For owners of this classic truck, maintaining proper lubrication is essential to ensuring longevity, especially given the vehicle’s age and the likely heavy-duty nature of the work it has performed. While the 5.0L V8 (engine code [N]) is a robust engine, modern synthetic lubricants offer superior protection against the wear, heat, and deposits that accumulate over decades of use. Using the correct oils and fluids reduces friction, improves performance, and extends the service intervals compared to conventional products, making maintenance easier and more effective for this specific application.
Recommended AMSOIL Products
- AMSOIL Signature Series 5W-30 100% Synthetic Motor Oil – Our premium motor oil designed for the 1987 Ford F250, offering up to 25,000 miles of protection and superior resistance to horsepower loss and engine wear.
- AMSOIL Oil Filter – Engineered to work seamlessly with our Signature Series oil, providing 99% filtration efficiency at 20 microns to capture small, wear-causing contaminants.
- WIX Oil Filter – A high-quality alternative featuring premium media that offers improvements over original equipment manufacturer-branded filters for those building a kit with our OE motor oil.
- AMSOIL Signature Series Multi-Vehicle 100% Synthetic Automatic Transmission Fluid – A versatile fluid for the 4-speed AOD or 3-speed C6 transmissions, designed to withstand heavy towing, elevated temperatures, and challenging terrain while remaining fluid in sub-zero conditions.
- AMSOIL SEVERE GEAR® 80W-90 100% Synthetic Gear Lube – The ideal lubricant for the front and rear differentials (GL-5 applications), providing advanced protection against wear, rust, and corrosion while helping to reduce operating temperatures.
Engine Oil and Filtration for the 5.0L V8
The heart of the 1987 Ford F250 is the 5.0L V8 engine. Proper lubrication here is critical, as the oil bears the load of keeping the internal components moving smoothly and dissipating the intense heat generated during combustion. For this vehicle, AMSOIL recommends a 5W-30 viscosity grade for all temperatures. This viscosity ensures optimal flow during cold starts while maintaining sufficient film strength at operating temperatures to protect the engine from metal-to-metal contact.
The oil capacity for the 5.0L 8-cylinder engine is 6.0 quarts when including the oil filter. When performing a refill, it is important to remove the dipstick to allow for adequate venting so the oil can flow freely into the crankcase. After refilling, always check the oil level to ensure it is within the correct range.
Owners of this truck have three excellent options within the AMSOIL lineup, each catering to different maintenance schedules and driving needs. The AMSOIL Signature Series 5W-30 is the top-tier choice, formulated to provide up to 25,000 miles of protection. It offers 75% more engine protection against horsepower loss and wear compared to conventional standards, making it ideal for owners who want to maximize the performance of their classic F250, even under severe service conditions.
For those looking for a robust option with slightly shorter but still extended service intervals, the AMSOIL Extended-Life 5W-30 is an outstanding choice. This formula provides 37% more cleaning power to help keep the engine running smoother for longer, with a guaranteed protection period of up to 20,000 miles.
If you prefer to stick closer to standard oil change intervals or want a cost-effective synthetic solution, the AMSOIL OE 5W-30 is a perfect fit. This 100% synthetic oil fights sludge and deposits effectively and is trusted to outperform conventional oils and OEM specifications.
For F250s that have logged over 75,000 miles, the AMSOIL 5W-30 100% Synthetic High-Mileage Motor Oil is specifically designed to address the unique needs of older engines. It features boosted detergents and dispersants, enhanced anti-wear additives, and is proven to reduce sludge by 67%. This helps extend the life of aging engines that may show signs of wear or increased oil consumption.
Filtering is just as important as the oil itself. The AMSOIL Oil Filter is rated to filter at 99% efficiency at 20 microns, allowing for lower restriction to keep engine parts lubricated while capturing contaminants that cause wear. For those using the OE or High-Mileage motor oil, the WIX Oil Filter is a recommended pairing, offering premium media that provides improvements over standard OEM filters.
Automatic Transmission Fluid
The 1987 Ford F250 typically comes equipped with either a 4-speed AOD or a 3-speed C6 automatic transmission, both requiring a fluid that can handle the stress of towing and hauling. The specification for these transmissions has been updated from Mercon to Mercon V per Technical Service Bulletin 06-14-4, making AMSOIL synthetic transmission fluids an excellent upgrade.
The AMSOIL Signature Series Multi-Vehicle 100% Synthetic Automatic Transmission Fluid is a robust choice for these applications. It withstands the rigors of heavy towing and elevated temperatures, providing reserve protection during heavy use and abuse. The fluid remains fluid in sub-zero temperatures, ensuring smooth shifts regardless of the climate. Total fill capacities can vary; the 4-speed AOD requires 12.3 quarts for a complete fill (with 3 quarts for an initial fill), while the 3-speed C6 requires 11.8 quarts total (with 5.9 quarts for initial fill).
For owners who prefer a slightly more economical synthetic option without sacrificing protection, the AMSOIL OE Multi-Vehicle 100% Synthetic Automatic Transmission Fluid is an excellent alternative. It protects against wear, resists harmful sludge, and guards against leaks while promoting smooth, shudder-free shifts.
Differential and Gear Lubrication
The front and rear differentials of the 1987 F250 are critical components that transfer power to the wheels, especially in 4WD models. These gears operate under immense pressure and require high-quality lubrication to prevent wear and noise. AMSOIL recommends the SEVERE GEAR® line for these applications.
The AMSOIL SEVERE GEAR® 80W-90 100% Synthetic Gear Lube is ideal for GL-5 applications found in most of the F250’s rear differentials, such as the Dana 60, Dana 61, Dana 70, Dana 80, and Ford 8.8 or 9.5-inch rear ends. It contains friction modifiers for limited-slip differentials and provides advanced protection against thermal runaway.
For those operating in extreme cold or seeking the highest level of protection, the AMSOIL SEVERE GEAR® 75W-90 or 75W-110 are also available options. These grades offer similar protection with a focus on thermal control and rust resistance.
Specific capacities vary by differential type. For instance, the front Dana 44 requires 3.6 pints, the Dana 50 requires 3.8 pints, and the Dana 60 requires 5.9 pints. The rear Dana 60 and 61 take 5.9 pints, while the Dana 70 HD requires 7.4 pints. The Dana 80 rear differential holds 8.2 to 8.5 pints, and the Ford 10.25 rear end requires 7.4 pints. The smaller Ford 8.8 or 9-inch rear ends require 5.5 pints. The transfer case also requires specific attention; models like the NP208 require 9.1 pints, while Warner transfer cases (1345, 1356) have specific capacities ranging from 4 to 6.3 pints. In these transfer cases, a high-performance automatic transmission fluid like the AMSOIL Signature Series Fuel-Efficient ATF or OE Fuel-Efficient ATF can be used, as they meet the necessary specifications.
Coolant and Brake Fluid
Keeping the cooling system healthy is vital for the 5.0L engine. The 1987 Ford F250 requires a significant amount of coolant, with capacities varying between 12.7 and 14.8 quarts depending on whether the air conditioning is installed and the type of transmission fluid used. The AMSOIL Passenger Car & Light Truck Antifreeze & Coolant is a convenient, pre-mixed (50/50) solution that protects the cooling system for up to 150,000 miles or 5 years. It is phosphate-, nitrate-, nitrite-, silicate-, borate-, and amine-free, making it compatible with all metals and seals in the cooling system.
For those who prefer a concentrated antifreeze, the AMSOIL Propylene Glycol Antifreeze and Engine Coolant is an option that requires mixing with distilled or high-quality water. This formula offers extended protection up to 150,000 miles and is designed to greatly surpass standards for metallic corrosion and erosion.
Brake safety cannot be overlooked. The 1987 F250 uses hydraulic brake fluid meeting Ford specification WSS-M6C65-A1. The AMSOIL DOT 3 and DOT 4 100% Synthetic Brake Fluid provides excellent responsiveness for ABS and traction control systems. It maintains a stable viscosity over a wide temperature range, ensuring consistent braking performance even during repeated stops or in extreme heat.
Vehicle Background and History
About the 1987 Ford F250
The 1987 Ford F250 represents a pivotal era for Ford’s heavy-duty truck lineup. Part of the renowned “square body” F-Series generation, which began in 1980 and continued through the late 1990s, the F250 was marketed as a robust work truck capable of handling both commercial applications and recreational towing. The vehicle sits in the medium-duty class, positioned above the lighter F150 but below the heavy-duty F350 and F450 models. Its body-on-frame construction and solid front axle provided the necessary strength for towing, hauling, and navigating rough terrain, establishing a reputation for reliability that continues to attract enthusiasts today.
Under the hood of the specific 1987 model with the 5.0L V8, the vehicle offered a balance of power and fuel economy for its size. While the larger 7.5L V8 and 6.9L diesel engines were available for maximum duty, the 5.0L V8 (engine code [N]) provided sufficient power for many tasks, including moderate towing and daily driving. The engine features a standard 2-barrel carburetor in many configurations, known for its simplicity and ease of maintenance. The interior design of this generation focused on practicality, with durable materials and a straightforward dashboard layout that prioritized function over luxury.
This truck is highly regarded for its durability and longevity. Owners often praise the F250 for its ability to endure decades of hard work with proper maintenance. However, like any vehicle of this age, it faces specific challenges that can be mitigated with modern lubricants. One common issue in older F-Series trucks is wear in the oil pump drive gears, which can lead to oil pressure drops. Using high-quality synthetic oils like AMSOIL can help reduce wear in these aging components. Another frequent concern is the buildup of deposits in the cooling system, which can lead to overheating. AMSOIL’s advanced antifreeze formulations help prevent this by protecting against corrosion and scaling. Additionally, the older automatic transmissions (AOD and C6) in these trucks can suffer from fluid degradation and shudder issues over time; switching to a synthetic transmission fluid can significantly smooth out shifting and extend transmission life. Finally, rust and corrosion in the chassis and undercarriage remain a significant threat for trucks of this vintage. Regular application of metal protectors and proper sealing can help preserve the structural integrity of the vehicle against the elements.
Maintenance Tips and Seasonal Care
Beyond the primary fluid changes, seasonal storage is a crucial aspect of maintaining a classic truck like the 1987 F250. If the vehicle is used seasonally, using AMSOIL Gasoline Stabilizer helps keep fuel fresh for up to 12 months, preventing varnish and gum buildup that can clog the carburetor. For long-term storage, AMSOIL Engine Fogging Oil is recommended to coat internal engine components and prevent rust during periods of inactivity.
For those who need to clean the engine or carburetor to restore performance, AMSOIL Power Foam® Carburetor and Induction-System Cleaner is an effective solution for removing deposits from ethanol and degraded fuel, maximizing horsepower and restoring startability. Regular car care products, such as the AMSOIL Miracle Wash Waterless Wash and Wax Spray or the Exterior Ceramic Spray, also help protect the paint and finish from the sun’s ultraviolet rays and environmental contaminants.
By adhering to a rigorous maintenance schedule using AMSOIL synthetic lubricants, owners can ensure their 1987 Ford F250 remains a reliable and powerful vehicle for years to come. Whether for show, work, or recreation, proper lubrication is the key to preserving the legacy of this iconic American truck.