Maintaining the lubrication systems in your 2012 Infiniti M56 is essential for preserving the performance and longevity of its 5.6-liter V-8 engine. This luxury performance sedan is designed for high power output and precise handling, requiring fluids that can withstand the thermal stress and mechanical demands of the vehicle. Whether you are driving on the highway or navigating city traffic, using the correct viscosity and formulation helps ensure optimal engine protection, fuel efficiency, and component durability.
Recommended AMSOIL Products
- AMSOIL Signature Series 5W-30 100% Synthetic Motor Oil – Offers unsurpassed engine protection and can extend intervals up to 25,000 miles, ideal for high-performance driving conditions.
- AMSOIL Extended-Life 5W-30 100% Synthetic Motor Oil – Provides a balanced option with 37% more cleaning power for up to 20,000 miles of protection.
- AMSOIL OE 5W-30 100% Synthetic Motor Oil – A high-mileage approved synthetic oil designed to outperform conventional oils and meet strict OEM specifications.
- AMSOIL 5W-30 100% Synthetic High-Mileage Motor Oil – Specifically formulated for vehicles with over 75,000 miles to reduce leaks and sludge while maintaining performance.
- AMSOIL Oil Filter – Designed to provide 99% filtering efficiency at 20 microns, allowing lower restriction for better lubrication and extended service life.
- WIX Oil Filter – A premium alternative that offers improvements over original equipment manufacturer branded filters.
- WIX Air Filter – A high-quality filtration solution for maintaining air intake cleanliness.
- AMSOIL Signature Series Fuel-Efficient 100% Synthetic Automatic Transmission Fluid – Withstands heavy towing and high temperatures while remaining fluid in sub-zero conditions.
- AMSOIL OE Fuel-Efficient 100% Synthetic Automatic Transmission Fluid – Delivers excellent wear protection for automatic transmissions in demanding conditions.
- AMSOIL SEVERE GEAR® 80W-90 100% Synthetic Gear Lube – Advanced protection against wear and rust for front differentials requiring GL-5 specifications.
- AMSOIL SEVERE GEAR® 75W-90 100% Synthetic Gear Lube – Ideal for rear differentials, offering extended equipment life and better cold-weather shifting.
- AMSOIL Passenger Car & Light Truck Antifreeze & Coolant – A 50/50 pre-mix formula that protects cooling system metals and hoses up to 150,000 miles.
- AMSOIL DOT 3 and DOT 4 100% Synthetic Brake Fluid – Provides excellent ABS responsiveness and a stable viscosity over a wide temperature range.
- AMSOIL 100% Synthetic Multi-Vehicle Power Steering Fluid – Formulated for quiet operation with strong resistance to heat and friction reduction.
Why Proper Lubrication Matters for the 2012 Infiniti M56
The 2012 Infiniti M56 is powered by a 5.6-liter VK56VD engine, a robust 8-cylinder powerplant that delivers significant horsepower and torque. This engine is part of Nissan’s VK series, known for its durability and smooth operation in luxury applications. However, this performance comes with a demand for high-quality lubricants. The oil must not only reduce friction but also manage the heat generated by the V-8 configuration during spirited driving or towing. Using a standard mineral oil may not provide sufficient thermal stability, leading to potential wear on critical components like the camshafts and valve train.
Proper lubrication extends the service life of the engine by preventing the formation of sludge and varnish, which can clog oil passages and starve bearings of oil. For the Infiniti M56, AMSOIL Signature Series and Extended-Life motor oils are engineered to resist oxidation and thermal breakdown far better than conventional oils. This means the fluid remains effective for longer periods, maintaining its viscosity even under the extreme temperatures found in stop-and-go traffic or on hot summer days. Additionally, the high-quality detergents and dispersants in these oils help keep the engine internals clean, ensuring that the Variable Valve Event and Lift System operates smoothly without carbon buildup.
Engine Oil and Filter Recommendations
For the 2012 Infiniti M56, the engine oil capacity is 6.4 quarts with a filter change. This specification is critical to ensure that the oil pump draws enough fluid to coat all moving parts effectively. AMSOIL Signature Series 5W-30 is a top-tier choice, offering up to 25,000 miles of protection between changes. This viscosity grade is ideal for all temperatures, providing quick circulation during cold starts and stable film strength during high-speed highway driving. If you prefer a slightly lower cost option without sacrificing synthetic benefits, the AMSOIL Extended-Life 5W-30 is a robust alternative that still delivers exceptional cleaning power and wear protection.
For those with higher mileage on their vehicle, specifically over 75,000 miles, the AMSOIL 5W-30 High-Mileage Motor Oil is recommended. This formula contains unique additives designed to condition seals, reducing the likelihood of oil consumption or leaks common in older engines. It also boosts the detergent package to combat existing sludge, helping to restore engine performance. When pairing these oils with a filter, the AMSOIL Oil Filter (EA15K13) is engineered to match the synthetic oil’s capabilities, offering high filtration efficiency to trap microscopic contaminants that would otherwise cause wear. The WIX Oil Filter (57356) serves as a high-quality alternative if preferred.
Transmission and Differential Fluids
The 2012 Infiniti M56 is equipped with a 7-speed RE7R01A automatic transmission, which is a critical component for the vehicle’s handling and power delivery. This transmission requires a specific fluid formulation, such as RE7R01A. AMSOIL Signature Series Fuel-Efficient Automatic Transmission Fluid is designed to meet these rigorous specifications. It is engineered to withstand the rigors of heavy towing, elevated temperatures, and challenging terrain while remaining fluid in sub-zero temperatures. This ensures smooth shifts and protects against wear and sludge formation. The AMSOIL OE Fuel-Efficient Automatic Transmission Fluid is another excellent option that provides comparable protection for standard driving conditions.
In the differential systems, proper lubrication is equally vital. The front differential requires 1.4 pints of GL-5 synthetic gear lube. The rear differential, which is also subject to high torque loads, requires 2.4 pints of 75W-90 synthetic gear lube. For these applications, AMSOIL SEVERE GEAR® 80W-90 and 75W-90 synthetic gear lubes are ideal. These products contain friction modifiers that are essential for limited-slip differentials, preventing the chattering that can occur with standard gear oils. They also control thermal runaway, protecting the gears from the intense heat generated during aggressive driving. The SEVERE GEAR® 75W-90 is particularly noted for its ability to improve cold-weather shifting and extend the life of seals.
Cooling and Brake Systems
The cooling system in the Infiniti M56 has a total capacity of 11.5 quarts. Maintaining the correct mixture of coolant is essential to prevent overheating and corrosion. AMSOIL Passenger Car & Light Truck Antifreeze & Coolant is a 50/50 pre-mix formulation that is phosphate-free and compatible with all cooling system metals. It offers protection for up to 150,000 miles, ensuring that the engine operates at its optimal temperature regardless of the weather. For those who prefer a concentrated option, AMSOIL Propylene Glycol Antifreeze and Engine Coolant is a durable choice that meets or exceeds OEM requirements for corrosion protection.
Braking performance relies on the integrity of the brake fluid. The Infiniti M56 utilizes a hydraulic brake system that requires DOT 3 fluid. AMSOIL DOT 3 and DOT 4 100% Synthetic Brake Fluid is formulated to provide excellent responsiveness for the ABS and traction control systems. Its stable viscosity ensures that the brakes feel consistent in both hot and cold conditions, preventing the “spongy” feel that can occur when standard fluid boils under heavy braking. The synthetic formulation also resists moisture absorption, which is a common cause of brake line corrosion over time.
Additional Fluids and Maintenance
Beyond the engine and transmission, the power steering system benefits from synthetic fluid as well. The AMSOIL 100% Synthetic Multi-Vehicle Power Steering Fluid is designed to reduce friction and keep seals soft to prevent leaks. This fluid offers excellent high-temperature protection and is formulated for quiet operation, ensuring that the steering remains smooth and silent throughout the vehicle’s life. The capacity for the power steering system should be checked and topped off as needed using this specialized fluid.
For seasonal storage, protecting the fuel system is crucial. The AMSOIL Gasoline Stabilizer helps keep fuel fresh for up to 12 months, preventing varnish and gum buildup that can clog fuel injectors. This is especially useful if the vehicle is not driven frequently during the winter months. Additionally, the AMSOIL P.i. Performance Improver gasoline additive can be used to restore lost horsepower and improve fuel economy by cleaning the fuel injectors. These additives work in tandem with the vehicle’s onboard systems to ensure that the engine receives a clean, efficient fuel supply.
Vehicle Background and Model History
The 2012 Infiniti M56 represents a significant chapter in the history of Infiniti’s luxury sedan lineup. Built on the Nissan D platform, the M56 shares its underpinnings with other high-performance Nissan vehicles, combining a robust chassis with a powerful engine. The “M” designation stands for “Magic” or “Motor,” highlighting its role as a sports sedan that blends comfort with performance. The 5.6-liter V-8 engine, codenamed VK56VD, was a flagship powerplant for Infiniti, delivering around 420 horsepower and 390 lb-ft of torque. This engine was known for its smooth power delivery and high-revving capabilities, making the M56 a favorite among driving enthusiasts who appreciated the balance of luxury and sportiness.
This model year saw the continuation of the second generation of the M Series, which was praised for its precise handling and advanced technology features. The Infiniti M56 was often compared to European rivals like the BMW 5 Series and Mercedes-Benz E-Class, offering a unique blend of Japanese reliability and German-like dynamics. Owners of this vehicle often value its reputation for durability and the satisfying experience of driving a naturally aspirated V-8. The car’s suspension system, featuring electronic dampers, allows for a comfortable ride on the highway while providing firm support during cornering. The interior was designed with premium materials, offering a quiet and spacious environment for both the driver and passengers. This combination of attributes made the 2012 M56 a top choice for those seeking a high-performance luxury sedan without the complexity of a turbocharger or hybrid system.
The legacy of the Infiniti M56 is built on its engineering philosophy, which prioritized mechanical excellence and driver engagement. Even today, owners of these vehicles continue to enjoy the smooth power delivery and the distinctive sound of the V-8 engine. The 2012 model year remains a sought-after option for collectors and enthusiasts who appreciate the era of naturally aspirated performance sedans. By maintaining the vehicle with high-quality synthetic lubricants, owners can ensure that the M56 continues to perform as intended, preserving its status as a premier luxury sports sedan. Whether for daily commuting or weekend driving excursions, the M56 delivers a dynamic driving experience that is both engaging and refined.