Ensuring your 1987 Mitsubishi VAN receives the correct lubricants is essential for maintaining the longevity and reliability of this classic vehicle. With an aging engine and transmission, modern synthetic lubricants offer superior protection against wear, sludge buildup, and thermal degradation compared to traditional mineral oils. Proper fluid selection helps mitigate the effects of age-related wear, such as oil consumption and sludge formation, while providing a safety margin against harsh operating conditions like hot summers and cold winters. By following the specific fluid capacities and specifications outlined below, owners can restore confidence in their vehicle’s performance and prevent costly mechanical failures.
Recommended AMSOIL Products
For the 1987 Mitsubishi VAN with the 2.4L 4-cylinder engine, selecting the right viscosity grade is crucial depending on your local climate. The engine requires a total capacity of 5.3 quarts when changing the oil with a filter. Below are the top AMSOIL motor oil choices tailored for this specific application.
- AMSOIL Signature Series 10W-30 100% Synthetic Motor Oil – The ultimate protection with 75% more resistance to horsepower loss and wear, ideal for extending the service life of older engines under severe conditions.
- AMSOIL Extended-Life 10W-30 100% Synthetic Motor Oil – Offers enhanced cleaning power to keep the engine running smoother with guaranteed protection for up to 20,000 miles between changes.
- AMSOIL OE 10W-30 100% Synthetic Motor Oil – A cost-effective, 100% synthetic option that fights sludge and deposits, providing a balanced solution for regular maintenance intervals.
- AMSOIL 10W-30 100% Synthetic High-Mileage Motor Oil – Formulated specifically for vehicles with over 75,000 miles, featuring boosted detergents to reduce sludge by 67% and help seal out oil leaks.
- WIX Oil Filter – A premium filtration solution that offers improvements over standard OEM-branded filters to ensure maximum flow and contaminant removal.
While the engine is the heart of the vehicle, the cooling system and transmission require equally attention. The cooling system capacity is 8.5 quarts with the radiator heater or 9 quarts with the rear heater. For the transmission, the 4-speed AW372L automatic requires 7.2 quarts for a total fill or 5 quarts for an initial fill. These systems benefit significantly from the thermal stability and longevity of synthetic formulations.
Transmission and Brake Fluid Recommendations
The automatic transmission in this van relies on fluid that can handle heavy towing, elevated temperatures, and the stress of daily driving. Standard mineral oils may degrade faster, leading to sludge and shudder. AMSOIL transmission fluids provide the necessary reserve protection during heavy use and ensure smooth, shudder-free shifts even in sub-zero temperatures.
- AMSOIL Signature Series Multi-Vehicle 100% Synthetic Automatic Transmission Fluid – Withstands the rigors of heavy towing and elevated temperatures while remaining fluid in sub-zero conditions, providing a reliable solution for severe service.
- AMSOIL OE Multi-Vehicle 100% Synthetic Automatic Transmission Fluid – An excellent choice that guards against leaks and promotes smooth shifts, protecting against wear and harmful sludge with excellent cold-weather performance.
Hydraulic brake fluid is also critical for safety. The vehicle requires DOT 3 fluid, which can suffer from moisture absorption and boiling point reduction over time. Switching to a synthetic alternative ensures consistent pedal feel and responsiveness.
- 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 safe braking performance in all conditions.
Cooling and Differential Protection
To keep the engine operating within safe temperature ranges, the cooling system requires high-quality antifreeze. The AMSOIL formulations used here are designed to exceed original equipment manufacturer (OEM) requirements and protect all cooling system metals, gaskets, and hoses.
- AMSOIL Passenger Car & Light Truck Antifreeze & Coolant – A 50/50 pre-mix formulation that provides protection up to 150,000 miles or 5 years, compatible with all other antifreeze colors and free of phosphates and silicates.
- AMSOIL Propylene Glycol Antifreeze and Engine Coolant – A concentrated option that requires mixing, offering protection up to 150,000 miles or 5 years and greatly surpassing standards for metallic corrosion and erosion.
Finally, the rear differential requires GL-5 gear lube. Synthetic gear lube offers better protection against wear, rust, and thermal runaway than conventional oils, helping to extend the life of the gears and seals.
- AMSOIL SEVERE GEAR® 80W-90 100% Synthetic Gear Lube – Provides advanced protection against wear, controls thermal runaway, and contains friction modifiers for limited-slip applications.
- AMSOIL SEVERE GEAR® 75W-90 100% Synthetic Gear Lube – Offers superior protection against wear and rust while helping to reduce operating temperatures for long oil and equipment life.
- AMSOIL SEVERE GEAR® 75W-110 100% Synthetic Gear Lube – An excellent choice for heavier loads, providing advanced protection against wear and controlling thermal runaway in demanding environments.
About the Vehicle
The 1987 Mitsubishi Van represents a distinct era of compact utility vehicles that were popular for their versatility and economical operation. Part of the first-generation lineup, this vehicle was designed primarily as a workhorse, capable of transporting both passengers and cargo with a level of flexibility that sedan-based vehicles of the time could not match. Powered by the L-series engine family, specifically the 2.4-liter four-cylinder in this configuration, the van offered a balance of torque and reliability that made it a favorite for small business owners, delivery services, and families needing extra space.
Unlike the modern vans with complex electronics and heavy computational requirements, the 1987 model relies on mechanical robustness and straightforward engineering. This simplicity is a hallmark of the era, where durability was often prioritized over luxury features. The 2.4L engine, while modest by today’s horsepower standards, provided sufficient power for city driving and light highway travel. Its overhead camshaft design contributed to smoother operation compared to older pushrod engines, making it a quiet performer for a vehicle of its size and age.
Owners of this classic van often appreciate its utilitarian design and the opportunity to maintain a vehicle that remains relevant despite its age. The platform’s origins reflect Mitsubishi’s focus on creating affordable, efficient vehicles for the Japanese and global markets during the late 1980s. While production details vary by region, the vehicle is generally known for its straightforward layout, which makes DIY maintenance a rewarding experience for enthusiasts.
However, owning a vehicle from 1987 does come with specific challenges that synthetic lubricants can help address. One common issue in these older engines is oil consumption due to worn piston rings or valve guides. The unique chemistry of AMSOIL High-Mileage Motor Oil can help reduce this consumption and seal out leaks, extending the time between rebuilds. Another frequent problem is sludge buildup, which can occur if the vehicle was previously subjected to short-trip driving or infrequent oil changes. The superior detergents in AMSOIL synthetic oils help to dissolve and suspend this sludge, clearing critical oil passages that might otherwise be blocked.
Additionally, older automatic transmissions in these vans are prone to shuddering and shifting delays as the friction plates wear or the fluid oxidizes. Using a synthetic transmission fluid can restore smooth shifting characteristics and protect against the wear that leads to premature failure. Finally, the cooling systems in these vehicles can suffer from corrosion and rust buildup over decades, particularly if they have been mixed with incompatible coolants. The specialized formulations of AMSOIL antifreeze help to inhibit corrosion and protect metal components, ensuring the engine stays cool even under the most demanding summer conditions. By addressing these common age-related issues with the right products, the 1987 Mitsubishi Van can continue to serve its owners reliably for years to come.
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