Maintaining the lubrication systems of a 1987 Mitsubishi Tredia equipped with the 1.8L G62B 2 Turbo engine requires precision and the right choice of fluids. This vehicle’s turbocharged powerplant, along with its aging transmission and cooling systems, demands a level of protection that standard mineral oils simply cannot provide. AMSOIL synthetic lubricants are engineered to handle the extreme temperatures and high stress factors associated with both modern driving conditions and the demands of this classic vehicle. By selecting the correct viscosities and capacities, owners can ensure optimal performance, reduced wear, and extended service intervals.
Recommended AMSOIL Products
Based on the specific requirements of the 1987 Mitsubishi Tredia 1.8L Turbo, the following products are recommended for a complete lubrication regimen:
- AMSOIL Signature Series 10W-30 100% Synthetic Motor Oil – Offers the ultimate level of engine protection with the ability to withstand high temperatures from the turbocharger and extreme cold starts, providing up to 25,000 miles of protection between changes.
- AMSOIL Extended-Life 10W-30 100% Synthetic Motor Oil – A versatile option delivering 37% more cleaning power to keep the engine running smoother and providing guaranteed protection for 20,000 miles.
- AMSOIL OE 10W-30 100% Synthetic Motor Oil – Formulated to fight sludge and deposits while meeting OEM requirements, offering a reliable choice for maintaining engine cleanliness.
- AMSOIL 10W-30 100% Synthetic High-Mileage Motor Oil – Specifically designed for vehicles with over 75,000 miles, featuring enhanced detergents and anti-wear additives to reduce sludge and improve engine longevity.
- WIX Oil Filter – A premium filter offering superior media that improves upon original equipment manufacturer standards to ensure clean oil flow and maximum engine protection.
- AMSOIL Passenger Car & Light Truck Antifreeze & Coolant – A 50/50 pre-mixed ethylene glycol formulation that protects all cooling system metals and components for up to 150,000 miles or 5 years.
- AMSOIL Propylene Glycol Antifreeze and Engine Coolant – A concentrated option that greatly surpasses corrosion standards and offers extended service life for up to 150,000 miles or 5 years in passenger cars.
- AMSOIL 75W-90 Manual Transmission & Transaxle Gear Lube – Engineered to protect brass synchronizers and withstand the heat and pressure of manual shifting, with excellent cold-flow properties.
- AMSOIL DOT 3 and DOT 4 100% Synthetic Brake Fluid – Provides stable viscosity across a wide temperature range, ensuring excellent responsiveness for ABS and traction-control systems.
- AMSOIL Signature Series Multi-Vehicle 100% Synthetic Automatic Transmission Fluid – The ultimate protection for the power steering and automatic transmission, remaining fluid in sub-zero temperatures and withstanding heavy load and elevated heat.
- AMSOIL OE Multi-Vehicle 100% Synthetic Automatic Transmission Fluid – A high-quality synthetic ATF that guards against leaks, resists sludge, and promotes smooth, shudder-free shifting.
Engine Oil and Filtration Specifications
The heart of the 1987 Mitsubishi Tredia 1.8L 4-cylinder engine is the G62B 2 Turbo unit. This engine benefits significantly from the high shear stability and thermal resistance of 100% synthetic motor oil. For ambient temperatures above -23°C, a 10W-30 viscosity is the primary recommendation. However, the vehicle’s lubrication system is versatile enough to handle 20W-20 or 20W-40 when temperatures remain above 0°C, and 5W-30 is recommended for operation in conditions below 16°C.
The oil capacity for this engine is critical to monitor during a service. A standard oil change requires 4.2 quarts when replacing the oil filter. It is essential to verify the oil level immediately after refilling to ensure the correct amount is in the system. When securing the drain plug, apply a torque of 26 to 32 ft-lbs to prevent leaks or stripped threads without damaging the pan.
Protection for the turbocharger is a key concern for this model. AMSOIL Signature Series 10W-30 100% Synthetic Motor Oil, AMSOIL Extended-Life 10W-30 100% Synthetic Motor Oil, AMSOIL OE 10W-30 100% Synthetic Motor Oil, and AMSOIL 10W-30 100% Synthetic High-Mileage Motor Oil are engineered to protect turbocharger bearings better than required by major industry standards, ensuring that the high-speed spinning components remain lubricated even under the intense heat generated during performance driving or heavy loads. Using a high-quality filter like the WIX Oil Filter ensures that contaminants are effectively removed from the oil, extending the life of the engine’s internal components.
Transmission and Gear Lubrication
The transmission system in the 1987 Tredia varies by model, but the lubrication requirements remain demanding. For vehicles equipped with the manual transmission, specifically the KM163-0 5-speed unit, the recommendation is a GL-4 compatible lubricant. The recommended fluid for manual transmissions under all temperature conditions is AMSOIL 75W-90 Manual Transmission & Transaxle Gear Lube. This fluid offers outstanding cold-flow properties and is friction-modified to protect brass synchronizers, a common wear point in older manual gearboxes.
The capacity for the manual transmission is approximately 4.9 pints. For those with automatic transmissions, the fluid choice is equally vital for maintaining smooth shifts and preventing sludge buildup. AMSOIL OE Multi-Vehicle 100% Synthetic Automatic Transmission Fluid provides a reliable alternative that guards against leaks and ensures cold-weather performance. For those seeking maximum performance, the AMSOIL Signature Series Multi-Vehicle 100% Synthetic Automatic Transmission Fluid offers superior protection against the rigors of heavy towing and elevated temperatures, making it an ideal choice for preserving the transmission’s health over the long term.
Cooling System and Brake Fluid
Aging vehicles require robust cooling systems to prevent overheating, especially for a car that has seen decades of service. The 1987 Mitsubishi Tredia holds a total of 7.4 quarts of AMSOIL Passenger Car & Light Truck Antifreeze & Coolant. Owners have the choice between AMSOIL Passenger Car & Light Truck Antifreeze & Coolant, a pre-mixed ethylene glycol solution that is phosphate, nitrite, and borate-free, and compatible with all coolant colors. Alternatively, the concentrated AMSOIL Propylene Glycol Antifreeze and Engine Coolant allows for custom mixing with distilled water, offering extended protection against metallic corrosion and erosion for up to 150,000 miles.
Hydraulic systems in older vehicles must also be maintained with precision. The 1987 Tredia utilizes a DOT 3 compatible hydraulic brake fluid. AMSOIL DOT 3 and DOT 4 100% Synthetic Brake Fluid is recommended to replace the old fluid. This synthetic fluid maintains a stable viscosity over a wide temperature range, which is crucial for consistent braking performance in both winter and summer conditions. It ensures excellent responsiveness for ABS systems and helps prevent the spongy brake pedal feel often associated with moisture absorption in traditional brake fluids.
About the Vehicle: The 1987 Mitsubishi Tredia
The 1987 Mitsubishi Tredia occupies a unique niche in automotive history as a sophisticated compact sedan that bridged the gap between utilitarian transport and performance driving. Produced by Mitsubishi Motors, the Tredia was a flagship model in the Japanese manufacturer’s lineup during the mid-1980s, known for its engineering prowess and value-oriented pricing. Unlike some of its contemporaries that focused solely on economy, the Tredia offered a blend of comfort, reliability, and surprisingly nimble handling characteristics that appealed to a wide range of drivers.
For the 1987 model year, the engine lineup was diverse, ranging from standard naturally aspirated units to the more sporty options. The specific 1.8L G62B 2 Turbo engine mentioned in the lubrication guides represents one of the more enthusiast-friendly variants of the Tredia. This turbocharged 4-cylinder engine was designed to deliver a power boost that was rare for a car in its size class at the time. The turbocharger adds a layer of complexity to the vehicle’s maintenance needs, as it introduces higher operating temperatures and increased stress on the lubrication system compared to the standard versions. This engine family is often associated with a lively driving character, providing spirited acceleration that rewards the driver while maintaining enough smoothness for daily commuting.
As a sedan, the Tredia offered a traditional three-box design with a focus on interior space for passengers and cargo, a common trait among Japanese sedans of that era. The vehicle’s platform was robust, contributing to its reputation for durability. Owners often cite the build quality as a standout feature, noting that even with high mileage, these cars can remain on the road with proper care. The driving dynamics are generally characterized by a comfortable ride quality, making it suitable for long highway trips, yet agile enough for city navigation. The combination of a turbocharged engine and a reliable transmission system made the Tredia a favorite among those who appreciated performance without the cost of a luxury sports car.
Over the decades, owners have identified a few recurring issues common to this specific model year and engine combination. One frequent problem is the degradation of rubber seals and gaskets due to age, which can lead to oil leaks. The high-quality detergents in AMSOIL Extended-Life 10W-30 100% Synthetic Motor Oil and AMSOIL OE 10W-30 100% Synthetic Motor Oil can help clean existing deposits and condition these seals to slow the rate of leakage. Another common issue involves the cooling system, where corrosion and rust can build up in the radiator and engine block over time. Using a phosphate-free antifreeze like the AMSOIL Passenger Car & Light Truck Antifreeze & Coolant or AMSOIL Propylene Glycol Antifreeze and Engine Coolant helps prevent this corrosion and protects the aluminum and steel components inside. Turbocharger wear is the third concern; the high-speed bearings can fail if the oil breaks down under heat, a risk that is significantly mitigated by the high thermal stability of AMSOIL Signature Series 10W-30 100% Synthetic Motor Oil. Finally, the manual transmission in these older cars can develop gear whine or grinding as synchros wear down; the extreme pressure additives in AMSOIL 75W-90 Manual Transmission & Transaxle Gear Lube provide a protective layer that can reduce friction and noise, extending the life of the transmission components.
Despite its age, the 1987 Mitsubishi Tredia remains a capable vehicle for those who value mechanical simplicity and driving engagement. With the correct fluids and attention to maintenance, it continues to provide reliable service, making it a rewarding vehicle for owners who are willing to invest in its long-term health.