The 2014 Scion FR-S with its 2.0L 4-cylinder FA20 F engine represents a pure driving experience, designed for enthusiasts who demand precision and handling. However, maximizing the longevity and performance of this sporty coupe begins with the fluids you choose. Using the correct lubricants is not just about following a manual; it is about ensuring that the high-revving engine and the precision-matched manual or automatic transmission receive the protection they need against wear, heat, and deposits. For a vehicle like the FR-S, which can be pushed to its limits on backroads or track days, standard conventional fluids may not provide sufficient protection against thermal breakdown or sludge accumulation. AMSOIL Signature Series Motor Oil, along with AMSOIL Signature Series Transmission Fluid, are specifically formulated to withstand the unique stressors of this engine code, offering superior film strength and extended service intervals that keep the powertrain running smoother for longer. For complete engine protection, a Premium Oil Filter is recommended.
Recommended AMSOIL Products
- AMSOIL Signature Series 0W-20 100% Synthetic Motor Oil – Provides unsurpassed engine protection, allowing for up to 25,000 miles between changes while offering 75% more protection against horsepower loss and wear.
- AMSOIL Extended-Life 0W-20 100% Synthetic Motor Oil – Delivers up to 20,000 miles of protection with enhanced cleaning power to keep the engine running smoother and longer.
- AMSOIL OE 0W-20 100% Synthetic Motor Oil – A high-performance choice that outperforms conventional oils and offers excellent defense against sludge and deposits for OEM-level mileage.
- AMSOIL 0W-20 100% Synthetic High-Mileage Motor Oil – Ideal for vehicles over 75,000 miles, featuring boosted detergents and reduced sludge to help older engines perform better.
- AMSOIL Oil Filter – Offers 99% efficiency at 20 microns, reduced restriction, and greater capacity for contaminants to protect engine components from wear.
- WIX Air Filter – Features premium media that offers improvements over original equipment manufacturer-branded filters to ensure optimal airflow.
- AMSOIL Passenger Car & Light Truck Antifreeze & Coolant – An ethylene glycol pre-mix formulation providing protection up to 150,000 miles or 5 years.
- AMSOIL Propylene Glycol Antifreeze and Engine Coolant – A concentrated option for ultimate protection up to 150,000 miles or 5 years, compatible with all cooling system metals.
- AMSOIL Signature Series Fuel-Efficient 100% Synthetic Automatic Transmission Fluid – Withstands heavy towing and elevated temperatures, remaining fluid in sub-zero conditions.
- AMSOIL OE Fuel-Efficient 100% Synthetic Automatic Transmission Fluid – Protects against wear for those seeking an OE-matching performance level.
- AMSOIL 75W-90 Manual Transmission & Transaxle Gear Lube – Protects brass synchronizers and offers outstanding cold-flow properties for the manual transmission variant.
- AMSOIL DOT 3 and DOT 4 100% Synthetic Brake Fluid – Ensures excellent ABS and traction-control responsiveness with stable viscosity across a wide temperature range.
- AMSOIL SEVERE GEAR® 75W-85 100% Synthetic Gear Lube – Advanced protection against wear and thermal runaway for rear standard differentials.
- AMSOIL SEVERE GEAR® 75W-90 100% Synthetic Gear Lube – Contains friction modifiers for limited-slip differentials to handle the high torque of the FR-S.
Engine Oil and Filter Specifications
The heart of the 2014 Scion FR-S is the FA20 F engine, a naturally aspirated 2.0-liter flat-four boxer engine. This engine is designed for high RPM operation and responsiveness. To support these characteristics, the manufacturer recommends a 0W-20 viscosity grade. The total capacity for an oil change, including the filter, is 5.8 quarts. It is critical to refill to the correct level and then check the oil level after the refill to ensure proper lubrication without overfilling, which can cause foaming and reduced engine life. The oil drain plug requires a specific torque of 31 ft/lbs, and a new washer should always be installed on the drain bolt to prevent leaks.
When choosing between the four AMSOIL motor oil options, the Signature Series stands out for drivers who want the absolute maximum protection. It offers 75% more protection against horsepower loss and wear compared to the industry standard and is the only oil guaranteed for up to 25,000 miles or one year. This makes it an excellent choice for drivers who push their vehicle hard or want to minimize the frequency of oil changes without sacrificing engine health. For those who prefer a slightly shorter interval than the Signature Series but still want synthetic benefits, the Extended-Life option provides up to 20,000 miles of protection and offers 37% more cleaning power than the OE line to help keep the engine running smoother. The OE line is a cost-effective 100% synthetic option that fights sludge and deposits effectively. Finally, for FR-S owners with over 75,000 miles, the High-Mileage formula features unique chemistry with boosted detergents to reduce sludge by 67% and minimize oil consumption, helping the engine last longer.
The accompanying AMSOIL Oil Filter is engineered to complement the synthetic oil. It provides filtering efficiency of 99 percent at 20 microns and allows for lower restriction, ensuring that oil keeps flowing freely to all critical engine parts. This reduced restriction helps maintain proper oil pressure, which is vital for high-performance engines. The filter also holds a greater capacity for small, wear-causing contaminants than competing filters, reducing overall engine wear and extending the life of the lubricant. Paired with the WIX Air Filter, which features premium media for improved airflow over OEM filters, the engine gets the clean oil and clean air it needs for optimal combustion and power output.
Transmission, Cooling, and Differential Fluids
The 2014 Scion FR-S is available with either a manual or automatic transmission, and each requires specific lubrication to function smoothly. For the automatic transmission, the total fill capacity is 7.9 quarts. Using a fluid like the AMSOIL Signature Series Fuel-Efficient Automatic Transmission Fluid ensures the transmission withstands the rigors of heavy use, elevated temperatures, and challenging terrain. It remains fluid in sub-zero temperatures and provides reserve protection during heavy use and abuse. For those seeking a standard OEM-compatible performance level, the AMSOIL OE Fuel-Efficient Automatic Transmission Fluid is an excellent choice that protects against wear.
For owners of the manual transmission, the fill capacity is 4.6 pints. The AMSOIL 75W-90 Manual Transmission & Transaxle Gear Lube is specifically designed to protect brass synchronizers, which is crucial for smooth shifting in performance driving. It features outstanding cold-flow properties and excellent seal compatibility, inhibiting rust and corrosion while extending the service life of the transmission. The drain and fill plugs for the manual transmission require a torque of 27 ft/lbs, and the gaskets should be replaced during service.
Cooling the FR-S engine is equally critical, as improper heat management can lead to reduced performance or engine damage. The coolant capacity varies slightly depending on the transmission type: 7.6 quarts for the manual and 7.9 quarts for the automatic. The AMSOIL Passenger Car & Light Truck Antifreeze & Coolant is a 50/50 pre-mix formulation that protects all cooling system metals, gaskets, and hoses for up to 150,000 miles or 5 years. It is free of phosphates, nitrates, and other additives that can cause corrosion. For those who prefer mixing their own, the AMSOIL Propylene Glycol Antifreeze and Engine Coolant offers concentrated protection with excellent corrosion resistance that vastly surpasses OEM standards.
The rear differential on the FR-S also requires regular attention. For standard differentials without limited-slip (LSD), the capacity is 2.4 pints. The AMSOIL SEVERE GEAR® 75W-85 provides advanced protection against wear and controls thermal runaway. If the vehicle is equipped with a limited-slip differential, a different viscosity is recommended to handle the clutch packs. In this case, the AMSOIL SEVERE GEAR® 75W-90 with its friction modifiers is the correct choice. Both oils help reduce operating temperatures and contain special additives that protect against rust and corrosion.
Brake Fluid and Additives
Brake fluid is often overlooked, but it plays a vital role in the safety and performance of the FR-S. The vehicle uses a hydraulic DOT 3 brake fluid system. Over time, brake fluid absorbs moisture from the atmosphere, which lowers its boiling point and can lead to brake fade or corrosion. The AMSOIL DOT 3 and DOT 4 100% Synthetic Brake Fluid offers a stable viscosity over a wide temperature range, ensuring excellent ABS and traction-control responsiveness. It is fully compatible with DOT 3 systems and provides superior protection against boiling compared to conventional glycol-based fluids.
To further enhance performance and fuel economy, the AMSOIL P.i.® Performance Improver is a recommended addition. This gasoline additive restores up to 14% horsepower and cleans GDI fuel injectors to 100% flow rate after just one tank. It reduces the need for higher-octane fuel and helps prevent carbon buildup and pre-ignition knock, ensuring the engine runs at its peak efficiency.
About the Vehicle
The 2014 Scion FR-S holds a unique position in the automotive landscape as a collaboration between Subaru and Toyota. Under the hood lies the 2.0L FA20 boxer engine, a design borrowed from Subaru’s renowned Boxer engine family, known for its low center of gravity which enhances handling dynamics. This engine, in the FR-S, produces approximately 200 horsepower and pairs with either a six-speed manual transmission or a six-speed automatic with paddle shifters. The car was marketed as an affordable sports coupe that offered a “driving purist” experience, emphasizing steering feel, balance, and chassis rigidity over outright speed or luxury appointments.
As a rear-wheel-drive vehicle with a near 50/50 weight distribution, the FR-S delivers neutral handling characteristics that are rare in its price class. It was designed to be a driver’s car, encouraging enthusiasts to take the vehicle to the limit on winding roads. The platform, shared with the Toyota GT86 and later the Subaru BRZ, has garnered a loyal following in the automotive community. While it may not be the most powerful car on the road, its balanced chassis and responsive steering make it a favorite for autocross, track days, and spirited canyon runs. Maintaining this balance and the engine’s ability to rev freely requires high-quality fluids that do not break down under stress. The FR-S is a compact sports coupe built in Japan, representing a significant chapter in the revival of affordable, pure driving cars. Its reputation is built on being a “blank canvas” for tuners and a perfect daily driver for those who prioritize the joy of driving over passenger comfort.
Regular maintenance with these recommended synthetic products ensures that the 2014 Scion FR-S remains a reliable and responsive machine for years to come. By utilizing the best AMSOIL lubricants, owners can extend service intervals, improve fuel efficiency, and protect their investment in one of the most engaging sports coupes of its era.