The 1987 Plymouth COLT with the 1.6L 4-cylinder engine code [F] F Turbo is a compact vehicle that demands specific attention to its lubrication needs. Proper fluid maintenance is critical for this model, particularly because its turbocharged engine operates under higher thermal loads than naturally aspirated units. Using the correct viscosity and fluid specifications ensures that the turbocharger shaft bearings remain properly lubricated during high-speed operation, preventing premature wear. Beyond the engine, the cooling system, transmission, and brake hydraulics all rely on fluids that meet precise chemical standards to maintain performance and safety over decades of service.
Recommended AMSOIL Products
- AMSOIL Signature Series 10W-30 100% Synthetic Motor Oil – Offers maximum protection for the turbocharged engine, providing 75% more protection against horsepower loss and wear while enduring the high heat generated by the forced induction system.
- AMSOIL Extended-Life 10W-30 100% Synthetic Motor Oil – Provides a cost-effective option with 37% more cleaning power to help keep the engine running smoother and offers 20,000 miles of guaranteed protection.
- AMSOIL OE 10W-30 100% Synthetic Motor Oil – A high-performance synthetic option designed to fight sludge and deposits, ensuring the engine remains clean and efficient.
- WIX Oil Filter – A premium filtration component with media that offers improvements over original equipment manufacturer-branded filters to trap harmful contaminants effectively.
- AMSOIL Signature Series Multi-Vehicle 100% Synthetic Automatic Transmission Fluid – Designed to withstand the rigors of heavy use and elevated temperatures while remaining fluid in sub-zero conditions for smooth shifting.
- AMSOIL 75W-90 Manual Transmission & Transaxle Gear Lube – Protects brass synchronizers and gears against increased heat and pressure with outstanding cold-flow properties for precise shifting.
- AMSOIL Passenger Car & Light Truck Antifreeze & Coolant – A pre-mixed ethylene glycol formulation that protects all cooling system metals, gaskets, and hoses from corrosion and overheating.
- AMSOIL DOT 3 and DOT 4 100% Synthetic Brake Fluid – Delivers excellent ABS and traction-control responsiveness with a stable viscosity over a wide temperature range for reliable braking performance.
Selecting the right engine oil is the most critical maintenance task for this vehicle. The 1987 Plymouth COLT 1.6L Turbo requires a 10W-30 viscosity for operation in temperatures above -23°C, with a total capacity of 4.2 quarts when changing the filter. It is important to remember to check the oil level after refill and to torque the oil drain plug to the specified 26-32 ft/lbs. AMSOIL Signature Series 10W-30 100% Synthetic Motor Oil is particularly beneficial here because of the turbocharger; synthetic oils resist the thermal breakdown that often plagues conventional oils in turbocharged applications, where oil temperatures can soar well beyond the limits of mineral-based fluids. This ensures the turbo shaft bearings receive a consistent film of lubrication even during aggressive driving or extended highway cruising.
For owners who prefer a more budget-friendly synthetic option, the Extended-Life 10W-30 provides robust protection with a focus on cleaning power. It helps keep the engine running smoothly and reduces the frequency of changes required, offering up to 20,000 miles of protection in normal service. The OE 10W-30 is another excellent choice, formulated specifically to fight sludge and deposits that can accumulate in older engines. For vehicles with significant mileage, the 10W-30 High-Mileage Motor Oil is designed to condition seals and reduce oil consumption, which can be a common issue in aging engines. The recommended WIX Oil Filter complements any of these oils by ensuring that contaminants are effectively removed from the circulation loop, preventing abrasive wear on cylinder walls and bearing surfaces.
Transmission maintenance is often overlooked but vital for the longevity of this vehicle. For automatic transmissions, the capacity for a 3-speed total fill is 6.4 quarts, while the initial fill is 4.2 quarts. The Signature Series Multi-Vehicle 100% Synthetic Automatic Transmission Fluid is engineered to handle the stress of shifting, resisting sludge formation and maintaining fluid viscosity in extreme cold or hot conditions. This ensures smooth, shudder-free shifts and protects against wear. If the COLT is equipped with a manual transmission, the 75W-90 Manual Transmission & Transaxle Gear Lube is the recommended lubricant. It offers protection for brass synchronizers and provides excellent seal compatibility, which helps prevent leaks in older units where seals may have hardened over time.
The cooling system plays a pivotal role in keeping the engine, especially the turbocharged variant, at safe operating temperatures. The 1987 COLT requires 5.3 quarts of AMSOIL Passenger Car & Light Truck Antifreeze & Coolant. Using this formulation provides protection for up to 150,000 miles or five years. This formulation is phosphate-, nitrate-, and silicate-free, making it compatible with a wide range of vehicle materials and preventing the formation of sludge or mineral deposits that can clog radiator tubes. For those who prefer a concentrated product, the Propylene Glycol Antifreeze and Engine Coolant offers the same level of protection and can be mixed with distilled water to suit specific regional climate needs.
Safety is paramount in any vehicle, and the braking system must remain reliable. The Plymouth COLT utilizes hydraulic AMSOIL DOT 3 and DOT 4 100% Synthetic Brake Fluid meeting DOT 3 and DOT 4 standards. This provides a stable viscosity across a wide temperature range, ensuring that the brake pedal feels firm and responsive even after repeated use. This stability is crucial for maintaining consistent stopping power and prevents the vapor lock that can occur with moisture-laden conventional brake fluids, which is a particular concern in older vehicles that may have absorbed moisture over time.
Vehicle Background
The 1987 Plymouth COLT represents a significant era in American automotive history, embodying the practical and efficient design philosophy that defined the late 1980s compact car segment. During this time, Chrysler was heavily relying on the “Dodge/Plymouth Colt” badge-engineered partnership with Mitsubishi to supply their subcompact and compact offerings. The COLT was essentially a Mitsubishi Colt rebadged for the North American market, a strategy that allowed Plymouth to offer a reliable, well-built vehicle without the massive capital investment required to develop a new platform from scratch. This collaboration ensured that the COLT inherited the robust engineering and manufacturing quality associated with Mitsubishi, making it a dependable choice for families and commuters alike.
Under the hood of the 1.6L 4-cylinder turbocharged variant, owners found a powertrain that offered spirited performance for its class. The turbocharger provided a burst of power that was impressive for a compact economy car, allowing for quicker acceleration and better highway merging capabilities than naturally aspirated competitors. This engine configuration was a favorite among enthusiasts who appreciated the balance of fuel efficiency and performance. The vehicle typically featured a front-engine, front-wheel-drive layout, which contributed to a roomy interior despite the car’s compact exterior dimensions. This design maximized passenger space while maintaining a small turning radius, making it ideal for city driving.
Despite its reliability, the 1987 COLT Turbo can face specific challenges as it ages. One common issue is oil consumption, which can occur in higher-mileage engines due to worn valve stem seals or piston rings. Switching to a high-mileage synthetic motor oil can help condition these seals and reduce consumption, extending the life of the engine. Another potential problem is turbocharger bearing wear, which can be exacerbated by old, degraded oil that has lost its viscosity and thermal stability. Using a high-quality synthetic oil like Signature Series 10W-30 helps maintain a stable oil film, protecting the turbo bearings from premature failure. Cooling system corrosion is another concern, as the original antifreeze degrades over time, leading to rust and scale buildup that can clog the radiator and cause overheating. Regular use of a high-performance antifreeze and coolant like AMSOIL Passenger Car & Light Truck Antifreeze & Coolant can prevent these deposits and protect the metal surfaces within the cooling system. Finally, brake fluid moisture absorption can lead to reduced braking performance and corrosion in the brake lines. AMSOIL DOT 3 and DOT 4 100% Synthetic Brake Fluid resists moisture absorption better than conventional fluids, ensuring consistent pedal feel and protecting the braking system from rust and corrosion. These maintenance practices, centered around high-quality lubricants, help owners keep their 1987 Plymouth COLT running smoothly for years to come.