Keeping your 1987 Plymouth Colt running reliably requires more than just changing fluids on a schedule; it demands the right formulations for the vehicle’s specific engine design and age. Proper lubrication ensures optimal protection against wear, extends the life of critical components like the transmission and cooling system, and helps maintain fuel efficiency. For a vehicle of this vintage, synthetic lubricants provide a superior barrier against sludge, heat, and oxidation compared to conventional alternatives.
Recommended AMSOIL Products
To ensure your 1987 Plymouth Colt receives the protection it needs, here are the top-tier AMSOIL synthetic options specifically recommended for this engine and its systems. These products are designed to handle the demands of older engines while offering extended performance intervals.
- AMSOIL Signature Series 10W-30 100% Synthetic Motor Oil – The ultimate choice for maximum engine protection, offering 75% more resistance against horsepower loss and wear while meeting rigorous industry standards.
- AMSOIL Extended-Life 10W-30 100% Synthetic Motor Oil – An excellent alternative with 37% more cleaning power to help keep older engines running smoother for up to 20,000 miles between changes.
- AMSOIL OE 10W-30 100% Synthetic Motor Oil – A cost-effective synthetic option formulated to fight sludge and deposits, providing reliable protection for high-mileage vehicles.
- AMSOIL 10W-30 100% Synthetic High-Mileage Motor Oil – Specifically designed for vehicles with over 75,000 miles, featuring boosted detergents to clean out existing sludge and reduce oil consumption.
- WIX Oil Filter – A premium filtration solution that offers improvements over original equipment manufacturer filters, ensuring oil circulates cleanly through the engine.
- AMSOIL Passenger Car & Light Truck Antifreeze & Coolant – A 50/50 pre-mixed formulation that protects the cooling system metals, gaskets, and hoses for up to 150,000 miles or 5 years.
- AMSOIL Propylene Glycol Antifreeze and Engine Coolant – A concentrated coolant that can be mixed with distilled water to handle extreme temperatures and protect against corrosion for up to 150,000 miles.
- AMSOIL Signature Series Multi-Vehicle 100% Synthetic Automatic Transmission Fluid – Withstands heavy towing and elevated temperatures while remaining fluid in sub-zero conditions for smooth shifting.
- AMSOIL OE Multi-Vehicle 100% Synthetic Automatic Transmission Fluid – Provides excellent protection against wear and sludge with a focus on smooth, shudder-free shifts and leak prevention.
- AMSOIL 75W-90 Manual Transmission & Transaxle Gear Lube – An outstanding lubricant for manual transmissions that protects brass synchronizers and inhibits rust for long service life.
- AMSOIL DOT 3 and DOT 4 100% Synthetic Brake Fluid – Delivers excellent ABS responsiveness and stable viscosity across a wide temperature range to ensure safe stopping power.
Understanding the specific needs of the 1987 Plymouth Colt’s 1.5L engine is essential for maintaining its performance. The recommended engine oil capacity for this model is 3.7 quarts when including a filter change. It is crucial to adhere to the correct viscosity grade based on the ambient temperature to ensure proper startup protection. In temperatures below 16°C, SAE 5W-30 or 5W-40 are suitable, while 10W-30, 10W-40, or 10W-50 are recommended for warmer conditions above -23°C. For extremely hot climates above 0°C, 20W-20, 20W-40, or 20W-50 can be used, though SAE 5W-20 is generally not recommended for sustained high speeds. The oil drain plug torque specification is critical to prevent leaks or stripped threads and should be tightened to between 26 and 32 ft/lbs. Always check the oil level after refilling to ensure the engine is at the proper operating volume.
Beyond the engine, the cooling system requires attention to prevent overheating, which can be a common issue in vehicles from this era. The cooling system holds 5.3 quarts of fluid. Using a high-quality antifreeze like the AMSOIL Passenger Car & Light Truck Antifreeze & Coolant ensures that the coolant mixture protects against freezing in winter and boiling in summer. The phosphate-, nitrate-, and silicate-free formula is compatible with all other antifreeze colors and materials, making it a versatile choice for older cooling systems that may have mixed chemicals in the past. For those who prefer concentrated coolants to mix themselves, the AMSOIL Propylene Glycol Antifreeze offers a high-performance alternative that can be diluted to achieve superior corrosion and erosion protection.
Transmission maintenance is another vital aspect of owning this vehicle. The automatic transmission has a total fill capacity of 6.4 quarts for the 3-speed KM171-1 and KM171-2 models, with an initial fill of 4.2 quarts. Synthetic automatic transmission fluids are highly recommended for this application because they resist breakdown under heat, which helps prolong the life of the transmission bands and clutches. The AMSOIL Signature Series Multi-Vehicle 100% Synthetic Automatic Transmission Fluid is an excellent choice for heavy-duty use, while the OE Multi-Vehicle version offers reliable performance for standard driving conditions. Both formulas promote smooth shifting and guard against leaks, which can be a common issue as seals harden with age.
For those driving the manual transmission variant, the capacity varies slightly depending on the gear count. The 4-speed KM200-0 requires 3.6 pints, while the 5-speed KM201-0 takes 3.8 pints. Both require a GL-4 grade fluid, such as the 75W-85W viscosity. AMSOIL’s 75W-90 Manual Transmission & Transaxle Gear Lube is an ideal replacement, offering outstanding cold-flow properties and protection for brass synchronizers. This synthetic gear lube also inhibits rust and corrosion, extending the service life of the transmission components. Additionally, the hydraulic brake system requires DOT 3 fluid meeting MS-4574 specifications. The AMSOIL DOT 3 and DOT 4 100% Synthetic Brake Fluid ensures reliable stopping power with a high boiling point, reducing the risk of brake fade under heavy use.
About the Vehicle
The 1987 Plymouth Colt represents a significant chapter in American automotive history, bridging the gap between domestic budget cars and the rising tide of imported Japanese engineering. Built on the Mitsubishi Galant platform, the Colt was part of a strategic collaboration that brought Japanese reliability and efficiency to the U.S. market at a competitive price point. As a compact front-wheel-drive vehicle, the Colt was designed for fuel economy and practicality, making it a popular choice for daily commuting and family use.
The specific 1.5L four-cylinder engine in this model was known for its robustness and simplicity. While not a powerhouse in terms of raw horsepower compared to modern V6 or V8 engines, it was more than adequate for the vehicle’s weight and intended driving style. The engine’s design emphasized longevity and ease of maintenance, features that resonated with owners who valued reliability over high-performance driving. The front-wheel-drive layout offered better traction in adverse weather conditions compared to rear-wheel-drive vehicles of the same era, enhancing its appeal for drivers in regions with cold winters.
Owners of the 1987 Plymouth Colt often appreciate the straightforward nature of the vehicle. The interior, though basic by today’s standards, was functional and durable. The car’s suspension tuning was geared towards comfort, providing a smooth ride over imperfect roads. Over the decades, the Colt has developed a reputation as a dependable runner that, with proper care, can continue to serve its owner well. The simplicity of its mechanical systems makes it an ideal candidate for DIY maintenance, allowing enthusiasts to perform oil changes, filter replacements, and fluid flushes without requiring specialized tools.
However, like any vehicle of this age, the Plymouth Colt is not without its challenges. One common issue is oil consumption, which can occur as the engine ages and piston rings or valve seals harden. Using a high-mileage synthetic motor oil with enhanced seal conditioners can help mitigate this problem, reducing oil consumption and minimizing smoke. Another frequent concern is cooling system degradation. The rubber hoses and gaskets in the cooling system may dry out and crack over time, leading to leaks. Switching to a high-quality antifreeze and coolant can help preserve these components and prevent overheating. Sludge buildup is a third potential issue, especially if the vehicle was previously serviced with conventional oil or neglected for long periods. AMSOIL’s synthetic oils with superior detergent packages can clean out existing deposits and prevent future sludge formation. Finally, transmission shudder or rough shifting can be a sign of worn fluid or internal wear. A complete flush and fill with a high-quality synthetic automatic transmission fluid can restore smooth shifting and protect the transmission from further wear.
By addressing these specific vulnerabilities with the right lubricants, owners can keep their 1987 Plymouth Colt running smoothly for years to come. The combination of synthetic motor oils, high-performance transmission fluids, and durable coolants provides a comprehensive solution for maintaining this classic compact car. Whether you are driving it daily or preserving it as a weekend cruiser, investing in quality lubricants is a smart move that pays off in reliability and performance.
Ensuring your vehicle has the correct fluids is a fundamental step in responsible car ownership. For the 1987 Plymouth Colt, using AMSOIL synthetic lubricants offers peace of mind and protection that exceeds the capabilities of traditional oils. From the engine block to the transmission and cooling system, these specialized fluids are designed to meet the unique demands of older vehicles. By following the recommended maintenance intervals and using the products listed, you can enjoy a smoother, more reliable driving experience. Remember that regular inspections and timely fluid changes are the keys to keeping this classic vehicle on the road.