Maintaining the 1986 Dodge Ramcharger with its 5.9L engine requires more than just standard replacement fluids; it demands lubricants engineered to handle the specific stressors of this classic vehicle. Proper lubrication ensures that the engine’s internal components operate with minimal friction, extending the vehicle’s lifespan and preserving its power output. Whether you are driving daily, using the truck for hauling, or preparing it for winter storage, selecting the right oils and coolants is critical for performance and reliability.
Recommended AMSOIL Products
For the 1986 Dodge Ramcharger 5.9L, AMSOIL offers a comprehensive range of synthetic lubricants designed to outperform conventional options. The following products are specifically formulated to meet the demands of this vehicle’s engine, transmission, and drivetrain.
- AMSOIL Signature Series 10W-30 100% Synthetic Motor Oil – Provides unsurpassed engine protection and extended drain intervals of up to 25,000 miles or one year, featuring superior wear protection against horsepower loss.
- AMSOIL Extended-Life 10W-30 100% Synthetic Motor Oil – Offers 37% more cleaning power to help keep the engine running smoother for up to 20,000 miles between changes.
- AMSOIL OE 10W-30 100% Synthetic Motor Oil – A high-performance option that fights sludge and deposits while providing protection equivalent to or exceeding OEM specifications.
- AMSOIL 10W-30 100% Synthetic High-Mileage Motor Oil – Specifically engineered for engines with over 75,000 miles, featuring enhanced additives to reduce sludge and protect aging seals.
- AMSOIL Oil Filter – Delivers 99% filtration efficiency at 20 microns and offers greater capacity for contaminants to reduce engine wear.
- WIX Oil Filter – A premium aftermarket alternative with media that offers improvements over standard OEM-branded filters.
- AMSOIL Signature Series Multi-Vehicle 100% Synthetic Automatic Transmission Fluid – Withstands heavy towing, elevated temperatures, and challenging terrain while remaining fluid in sub-zero conditions.
- AMSOIL OE Multi-Vehicle 100% Synthetic Automatic Transmission Fluid – Promotes smooth, shudder-free shifts and guards against leaks in automatic transmissions.
- AMSOIL SEVERE GEAR® 75W-140 100% Synthetic Gear Lube – Ideal for front and rear differentials like the Spicer 44 and 60F, offering advanced protection against wear and rust.
- AMSOIL SEVERE GEAR® 80W-90 100% Synthetic Gear Lube – Perfect for manual transmissions and limited-slip differentials, containing friction modifiers for smooth operation.
- AMSOIL SEVERE GEAR® 75W-90 100% Synthetic Gear Lube – Controls thermal runaway and helps reduce operating temperatures in transfer cases and differentials.
- AMSOIL DOT 3 and DOT 4 100% Synthetic Brake Fluid – Provides excellent responsiveness and stable viscosity over a wide temperature range for superior braking safety.
- AMSOIL 100% Synthetic Multi-Vehicle Power Steering Fluid – Reduces friction, keeps seals soft to prevent leaks, and offers strong anti-wear protection for power steering systems.
- AMSOIL Passenger Car & Light Truck Antifreeze & Coolant – A pre-mix formulation that protects cooling system metals, gaskets, and hoses for up to 150,000 miles or 5 years.
- AMSOIL Propylene Glycol Antifreeze and Engine Coolant – A concentrated option that greatly surpasses standards for corrosion protection in passenger cars and light trucks.
Engine Oil and Filtration
The heart of your 1986 Dodge Ramcharger is the 5.9L 8-cylinder engine, identified by the code [W]. This powerplant requires a reliable oil change every 25,000 miles or one year to maintain peak performance if using AMSOIL Signature Series. The standard capacity for this engine is 5.9 quarts when including the AMSOIL Oil Filter, though you should always check the oil level after refilling to ensure it is within the correct range. When performing the service, the oil drain plug should be torqued to 20 ft/lbs.
AMSOIL Signature Series 10W-30 is the top recommendation for this engine, offering 75% more protection against horsepower loss and wear compared to standard oils. It is formulated to resist the extreme temperatures and heavy loads typical of a Ramcharger’s usage. For those prioritizing value while still maintaining synthetic benefits, the Extended-Life 10W-30 provides up to 20,000 miles of protection. If the vehicle has accumulated significant mileage, the High-Mileage 10W-30 includes boosted detergents to clean the engine and reduce sludge, which is common in older vehicles.
Protecting the engine is just as important as the oil itself. The AMSOIL Oil Filter is designed to remove 99% of contaminants at 20 microns, ensuring that fresh oil circulates through the engine without carrying abrasive particles. This helps reduce wear on critical components. Alternatively, the WIX Oil Filter is a premium choice that offers improvements over original equipment manufacturer filters, ensuring proper flow and filtration efficiency.
Transmission and Drivetrain Fluids
The Ramcharger’s transmission and drivetrain components are subject to heavy wear, especially if the vehicle is used for towing or off-road driving. For the automatic transmission, AMSOIL recommends the Signature Series Multi-Vehicle 100% Synthetic Automatic Transmission Fluid. It is designed to withstand the rigors of heavy use and remains fluid even in sub-zero temperatures. The total fill for a 3-speed transmission is approximately 8.6 quarts, with an initial fill of 4 quarts. If your vehicle has a lockup torque converter, the fill capacity may vary slightly depending on the specific transmission model.
For manual transmissions, such as the A435 4-speed, AMSOIL SEVERE GEAR® 80W-90 is the ideal choice. It contains friction modifiers for limited-slip applications and helps control operating temperatures. The capacity for a manual transmission is 7 pints. When it comes to the transfer case, specifically the NP208 model, the same Signature Series fluid can be used, with a capacity of 5.9 pints. Ensure the fill and drain plugs are torqued to 18 ft/lbs.
The front and rear differentials require specific gear lubricants based on the axle type. For front Spicer 44 and 60F differentials, AMSOIL SEVERE GEAR® 75W-140 provides the necessary protection for all temperatures. For limited-slip differentials like the Spicer 60 and 70, or the rear 8.25 RG, AMSOIL SEVERE GEAR® 80W-90 is recommended. Note that for limited-slip applications, an additive like Mopar Trac-loc or an equivalent may be required to ensure proper operation. The capacity for the rear Spicer 60 is 5.9 pints, while the Spicer 70 holds 7 pints.
Cooling, Braking, and Fluid Maintenance
A well-functioning cooling system is vital for the longevity of the 1986 Dodge Ramcharger. AMSOIL Passenger Car & Light Truck Antifreeze & Coolant offers a unique poly-organic acid formulation that protects all cooling system metals, gaskets, and hoses. It is a phosphate-, nitrate-, and silicate-free formula that extends protection up to 150,000 miles or 5 years. The total coolant capacity is 15.3 quarts with air conditioning and 14.3 quarts without. For those who prefer a concentrated option, the Propylene Glycol Antifreeze can be mixed to achieve similar long-term protection.
Brake safety cannot be compromised. AMSOIL DOT 3 and DOT 4 100% Synthetic Brake Fluid is formulated to meet or exceed DOT 3 and DOT 4 specifications. It provides excellent responsiveness for anti-lock braking systems and traction control, maintaining a stable viscosity across a wide temperature range. This ensures consistent braking performance even under heavy use.
Additionally, the power steering system benefits from AMSOIL 100% Synthetic Multi-Vehicle Power Steering Fluid. This fluid reduces friction and helps keep seals soft, preventing leaks. It offers strong anti-wear protection and performs well in both high and low temperatures, ensuring quiet operation. For vehicles stored for extended periods, AMSOIL Gasoline Stabilizer helps keep fuel fresh for up to 12 months, protecting against varnish and gum buildup caused by ethanol corrosion.
Additional Products and Storage
To keep the Ramcharger in pristine condition, AMSOIL offers a wide array of cleaning and protecting products. The Power Foam® Carburetor and Induction-System Cleaner removes deposits from ethanol and degraded fuel, maximizing horsepower and restoring startability. For engine maintenance, the Upper Cylinder Lubricant Corrosion Inhibitor lubricates the fuel system and upper cylinders, which is especially beneficial for vehicles that see less frequent use.
When preparing the vehicle for storage, AMSOIL Engine Fogging Oil is highly effective. It provides a rust preventive layer designed to protect internal engine components during long periods of inactivity, making it ideal for winter storage. For exterior maintenance, the Miracle Wash Waterless Wash and Wax Spray allows you to clean and protect the paint without water, leaving a fantastic shine and tough protective finish. The Heavy-Duty Degreaser is perfect for removing grease and grime from the engine bay, while the Silicone Spray protects rubber components from cracking and drying out.
For those looking to enhance engine performance, the P.i.® Performance Improver Gasoline Additive can restore up to 14% horsepower and improves fuel economy. This additive helps prevent carbon buildup and controls pre-ignition knock. Whether you are performing a full fluid change, a detailed clean-up, or simply preparing for the off-season, the AMSOIL product line provides everything needed to keep your 1986 Dodge Ramcharger running smoothly and reliably.
Vehicle Background: The 1986 Dodge Ramcharger
The 1986 Dodge Ramcharger stands as a robust and capable example of late-1980s American automotive engineering. Part of the legendary D-series family, the Ramcharger shared its platform with the Dodge Pickup, offering the versatility of a pickup bed combined with the enclosed utility and cargo space of a full-size SUV. This unique design made it an ideal choice for families needing to haul gear, as well as for commercial users requiring a reliable workhorse. It was known for its rugged build quality and its ability to handle tough terrain, making it a favorite among off-road enthusiasts and farmers alike.
Under the hood, the 5.9L (360 cubic inch) V8 engine was a staple of the era, providing substantial torque for towing and hauling. This engine family was renowned for its durability and ease of maintenance, which contributes to the continued popularity of the Ramcharger among classic car collectors. The vehicle’s reputation for toughness is further cemented by its 4-wheel-drive capability, which was standard on many models, allowing owners to tackle snow, mud, and gravel roads with confidence. The Ramcharger was marketed as a vehicle that could do it all, from daily commuting to serious recreational use, a claim that many owners found to be true even decades after production ceased. Its enduring presence on roads and at car shows today is a testament to its solid construction and the enduring appeal of its classic, muscular design.