Keeping a 1987 Pontiac Fiero running smoothly requires more than just basic maintenance; it demands the right lubricants for its specific engineering. This vehicle, known for its distinctive mid-engine layout and sporty design, relies on high-quality fluids to withstand both spirited driving and daily commuting. Using the correct viscosities and fluid types helps maintain engine performance, ensures smooth gear shifts, and extends the overall lifespan of critical components.
Recommended AMSOIL Products
- AMSOIL Signature Series 5W-30 100% Synthetic Motor Oil – The top-tier choice offering superior wear protection and extending service intervals up to 25,000 miles or one year.
- AMSOIL Extended-Life 5W-30 100% Synthetic Motor Oil – An excellent value option providing up to 20,000 miles of protection with 37% more cleaning power to keep the engine running smoother.
- AMSOIL OE 5W-30 100% Synthetic Motor Oil – Designed to outperform conventional oils and fight sludge, serving as a reliable option for standard maintenance.
- AMSOIL 5W-30 100% Synthetic High-Mileage Motor Oil – A specialized formula for vehicles over 75,000 miles that includes enhanced additives to reduce leaks and sludge.
- AMSOIL Oil Filter – Provides 99% filtration efficiency at 20 microns, ensuring contaminants do not accumulate in the engine while maintaining low oil restriction.
- WIX Oil Filter – A premium aftermarket alternative featuring improved media that offers better filtration than many OEM-branded stock filters.
- AMSOIL Passenger Car & Light Truck Antifreeze & Coolant – A 50/50 pre-mix ethylene glycol formulation that protects cooling system metals and lasts up to 150,000 miles.
- AMSOIL Propylene Glycol Antifreeze and Engine Coolant – A concentrated non-toxic option requiring water mixing, capable of withstanding extreme temperatures and offering extended service life.
- AMSOIL Signature Series Fuel-Efficient 100% Synthetic Automatic Transmission Fluid – Withstands heavy towing and high temperatures while ensuring fluid operation in sub-zero conditions.
- AMSOIL OE Fuel-Efficient 100% Synthetic Automatic Transmission Fluid – A cost-effective synthetic alternative that provides essential protection against wear for automatic transmissions.
- AMSOIL 5W-30 Manual Synchromesh Transmission Fluid – Ideal for the Fiero’s manual gearbox, reducing friction and heat while improving cold-weather shifting performance.
- AMSOIL DOT 3 and DOT 4 100% Synthetic Brake Fluid – Offers a stable viscosity across wide temperature ranges and ensures excellent responsiveness for ABS and traction control systems.
- AMSOIL 100% Synthetic Multi-Vehicle Power Steering Fluid – Helps seals remain soft to prevent leaks while resisting heat for long fluid life and quiet operation.
The engine in the 1987 Fiero, specifically the 2.5-liter four-cylinder, benefits significantly from synthetic motor oil. These engines were designed in an era where mineral oils were standard, but synthetic technology has evolved to provide far superior protection against the high temperatures generated by the engine’s operation. With an oil capacity of 3.5 quarts including the filter, choosing the right viscosity is crucial for optimal lubrication throughout the engine’s range of motion. AMSOIL Signature Series 5W-30 100% Synthetic Motor Oil stands out as the premier option, offering 75% more engine protection against horsepower loss and wear compared to conventional standards. For those seeking to maximize their maintenance intervals without compromising safety, the Extended-Life version provides a robust solution with up to 20,000 miles of guaranteed protection.
Fuel economy and cleaning performance are also critical factors for the Fiero owner. The engine’s internal components can accumulate carbon deposits and varnish over time, particularly if the vehicle sees heavy use or infrequent oil changes. AMSOIL OE 5W-30 and Extended-Life 5W-30 motor oils are formulated with unique chemistries that combat sludge and deposits, ensuring the engine runs clean. High-mileage versions are specifically beneficial for Fieros with significant mileage on the odometer, utilizing a boosted detergent package and enhanced anti-wear additives to reduce sludge by up to 67%. This helps keep engines performing better and extending their operational life, addressing the common issue of oil consumption in older engines.
Beyond the engine, the transmission system requires specific attention. The Fiero was often paired with a manual transmission (such as the MG3) or an automatic transmission (like the THM125C). For the manual units, a capacity of roughly 4 pints or 5.5 pints depending on the specific configuration, the AMSOIL 5W-30 Manual Synchromesh Transmission Fluid is highly recommended. This fluid resists oxidation, acid buildup, and varnish, which are common culprits in shifting problems for vintage transmissions. It maximizes fuel economy and improves cold-weather shifting, ensuring smooth gear engagement even in winter conditions. For automatic transmissions, the capacity typically requires around 6 quarts for a total fill. Using a synthetic automatic fluid like the Signature Series or OE Fuel-Efficient varieties ensures the transmission remains fluid in sub-zero temperatures and withstands the rigors of heavy use, preventing the wear and sludge that can lead to costly repairs.
Maintenance of the cooling system is equally vital, as the 2.5L engine can run hot, especially in the Fiero’s unique layout where airflow dynamics are critical. The coolant capacity for this vehicle is 13.7 quarts. AMSOIL Passenger Car & Light Truck Antifreeze & Coolant offers a unique poly-organic acid (OAT) formulation that exceeds original equipment manufacturer requirements. It protects all cooling system metals, gaskets, and hoses, and is compatible with all other antifreeze colors, simplifying top-off procedures. For those who prefer a concentrated formula, the Propylene Glycol Antifreeze is an excellent choice, offering protection for up to 150,000 miles or five years. This formulation is phosphate, nitrate, nitrite, silicate, borate, and amine-free, which ensures compatibility with various metals and rubber components in older cooling systems.
Fluids for the braking and steering systems should not be overlooked. The Fiero utilizes hydraulic brake fluid meeting DOT 3 specifications. AMSOIL DOT 3 and DOT 4 100% Synthetic Brake Fluid provides a stable viscosity over a wide temperature range, ensuring consistent pedal feel and responsiveness. It also offers excellent ABS and traction-control responsiveness, which is crucial for maintaining control in emergency situations. Similarly, the power steering system benefits from AMSOIL 100% Synthetic Multi-Vehicle Power Steering Fluid. This fluid reduces friction, helps seals remain soft to prevent leaks, and offers strong anti-wear protection. Its formulation ensures quiet operation and resistance to heat, which is essential for the longevity of the power steering pump and rack in a vehicle of this age.
Why AMSOIL Is the Best Choice for Your 1987 Pontiac Fiero
Choosing AMSOIL for your 1987 Pontiac Fiero ensures that you are using industry-tested, driver-approved products that deliver maximum protection under all conditions. Whether you are driving in extreme temperatures, extending your time between oil changes, or towing light loads, AMSOIL synthetic motor oils will keep your Fiero protected. The brand’s commitment to rigorous third-party testing guarantees that you are getting the highest quality lubricants available. With options ranging from high-mileage formulas for older engines to specialized transmission fluids for manual and automatic gearboxes, AMSOIL provides a complete suite of fluids to keep your Pontiac Fiero running smoothly for the long haul. By upgrading to synthetic fluids, you not only improve performance but also contribute to the preservation of this classic sports car for future generations.
About the Vehicle
The 1987 Pontiac Fiero occupies a unique and memorable place in automotive history. Produced by General Motors under the Pontiac division, this model was marketed as a futuristic, affordable sports car that featured a distinctive mid-engine, two-seater configuration. The “Fiero” name is derived from the Latin word for “I believe,” reflecting the brand’s optimism regarding this innovative vehicle design. Unlike the rear-engine layout of the Volkswagen Beetle or the front-engine layout of most contemporary sports cars, the Fiero placed its engine behind the driver but ahead of the rear axle. This midship placement was intended to provide superior handling balance and a low center of gravity, offering a driving experience that was surprisingly agile for its price point.
During the 1987 model year, the Fiero continued to be powered primarily by the 2.5-liter “Iron Duke” inline-four engine, which was also available in a 2.8-liter V6 option in earlier and later production years. The 2.5-liter four-cylinder was known for its durability and simplicity, though it was not a high-performance powerhouse in terms of horsepower. It typically produced around 110 to 115 horsepower, relying on weight distribution rather than sheer engine output to deliver a spirited driving feel. The engine code [R] R specifically identifies the 2.5L 4-cylinder variant, a common configuration for this era of the Fiero. The vehicle’s design was also notable for its fiberglass composite body panels, which were lightweight and resistant to corrosion—a significant advantage in regions with harsh winters or coastal humidity.
Despite its innovative design and enthusiastic fan base, the Fiero has faced historical challenges that have affected its longevity. One of the most well-documented issues involves the engine mounts. In early production models, the engine mounts were prone to cracking, which could allow the V6 engine to shift violently under hard acceleration, potentially damaging exhaust components. While the 2.5L four-cylinder is less prone to this specific failure than the V6, the general wear on rubber mounting points in a 35-year-old vehicle can lead to excessive vibration and engine movement. Upgrading to synthetic lubricants can help mitigate the effects of this wear, providing better cushioning and protection for the engine and transmission mounts during operation.
Another common issue with the Fiero is related to its cooling system. The original equipment cooling components, including hoses and radiators, are often decades old. The plastic components used in the cooling system can become brittle over time, leading to leaks or cracks that cause the engine to overheat. Overheating is particularly dangerous for the engine, as it can warp cylinder heads and degrade the head gasket. Regularly flushing the system and filling it with a high-quality antifreeze like AMSOIL’s Propylene Glycol or Passenger Car & Light Truck Antifreeze can help maintain thermal stability and prevent these catastrophic failures. The synthetic coolant’s superior heat transfer properties and corrosion inhibitors are specifically beneficial for preserving the integrity of the cooling system’s older metal and plastic parts.
Corrosion and electrical gremlins have also plagued many Fieros over the years. Despite the fiberglass body, the steel chassis and undercarriage are susceptible to rust, especially in areas that use road salt during winter months. The electrical systems, which can be complex for a vehicle of this vintage, may suffer from connector corrosion or failing sensors. Using protective fluids and lubricants on exposed metal components and using synthetic brake and steering fluids that do not absorb moisture as quickly as conventional fluids can slow down corrosion and maintain system integrity. This approach helps preserve the vehicle’s structural safety and reliability, making it a more enjoyable classic to drive today.
Finally, the transmission in a 1987 Fiero, whether manual or automatic, is a critical component that has seen over thirty years of use. The manual gearbox, in particular, relies on precise lubrication to prevent grinding and wear on the synchronizer rings. The use of a dedicated manual synchromesh transmission fluid can significantly improve shifting smoothness and reduce the effort required to engage gears. For automatic models, the transmission fluid can break down over time, leading to slipping or harsh shifting. Regular fluid changes with a high-quality synthetic transmission fluid can restore the transmission’s performance and extend its service life, ensuring that the vehicle remains a reliable and enjoyable driver’s car. By addressing these common points of failure with superior lubrication, owners can keep their 1987 Pontiac Fiero on the road for years to come.