The 2007 Infiniti M45 is a sophisticated performance sedan powered by the robust VK45DE V8 engine. To ensure this powerful machine maintains its smooth acceleration, quiet operation, and long-term durability, using the correct lubricants is essential. The VK45DE engine requires a specific 5W-30 viscosity to handle its thermal load and ensure proper oil flow during cold starts and under heavy loads. Using AMSOIL synthetic lubricants provides a significant advantage over conventional oils, offering superior protection against wear, reduced oil consumption, and extended service intervals that can save time and money.
Recommended AMSOIL Products
- AMSOIL Signature Series 5W-30 100% Synthetic Motor Oil – The top choice for unsurpassed engine protection, offering up to 25,000 miles of coverage and fighting horsepower loss better than conventional oils.
- AMSOIL Extended-Life 5W-30 100% Synthetic Motor Oil – An excellent option for extended service intervals up to 20,000 miles, providing superior cleaning power to keep the engine running smoothly.
- AMSOIL OE 5W-30 100% Synthetic Motor Oil – A budget-friendly 100% synthetic alternative that outperforms conventional oils and fights sludge and deposits effectively.
- AMSOIL 5W-30 100% Synthetic High-Mileage Motor Oil – Specifically formulated for engines with over 75,000 miles, featuring enhanced detergents and seal conditioners to reduce sludge and consumption.
- AMSOIL Oil Filter – Designed for superior filtration efficiency and capacity, allowing lower restriction to keep engine parts lubricated and reducing wear from contaminants.
- WIX Oil Filter – A premium aftermarket option that offers improvements over original equipment manufacturer filters with high-quality media.
- AMSOIL Passenger Car & Light Truck Antifreeze & Coolant – A unique OAT formulation that protects all cooling system metals and components for up to 150,000 miles or 5 years.
- AMSOIL Propylene Glycol Antifreeze and Engine Coolant – A concentrated formula that greatly surpasses corrosion standards and is compatible with all other antifreeze colors.
- AMSOIL Signature Series Fuel-Efficient 100% Synthetic Automatic Transmission Fluid – Withstands heavy towing, high temperatures, and remains fluid in sub-zero conditions for the RE5R05A transmission.
- AMSOIL OE Fuel-Efficient 100% Synthetic Automatic Transmission Fluid – A cost-effective synthetic option that protects against wear and promotes smooth, shudder-free shifts.
- AMSOIL SEVERE GEAR® 80W-90 100% Synthetic Gear Lube – Provides advanced protection against wear and rust, ideal for front and rear differentials and limited-slip applications.
- AMSOIL SEVERE GEAR® 75W-90 100% Synthetic Gear Lube – Helps reduce operating temperatures and extends oil, seal, and equipment life in demanding conditions.
- AMSOIL DOT 3 and DOT 4 100% Synthetic Brake Fluid – Offers excellent ABS responsiveness and stable viscosity across a wide temperature range for consistent braking performance.
- AMSOIL 100% Synthetic Multi-Vehicle Power Steering Fluid – Reduces friction, prevents leaks by keeping seals soft, and offers excellent high and low-temperature performance.
- AMSOIL P.i.® Performance Improver Gasoline Additive – Restores up to 14% horsepower and cleans fuel injectors to 100% flow rate, improving fuel economy and preventing carbon buildup.
Why Proper Lubrication Matters for the 2007 Infiniti M45
The Infiniti M45 is engineered for high performance, and its 4.5-liter V8 engine demands the highest quality lubricants to function correctly. The VK45DE engine is known for its smooth power delivery, but like any complex internal combustion engine, it relies entirely on the oil within it to manage friction and heat. Over time, conventional oils break down, lose viscosity, and lose their ability to protect critical components like the turbochargers and variable valve timing systems. By switching to AMSOIL synthetic motor oils, owners can ensure that the engine operates within tight tolerances, even as the vehicle ages or is subjected to harsh driving conditions.
Proper lubrication extends beyond just the engine. The transmission fluid is equally critical for the smooth operation of the RE5R05A 5-speed automatic transmission. Transmission fluid can degrade due to heat and shear stress, leading to rough shifting or premature wear. Using a 100% synthetic automatic transmission fluid helps maintain the necessary fluid properties for longer periods, ensuring that the transmission shifts smoothly and efficiently. Similarly, the cooling system must be protected against corrosion and thermal runaway. The radiator and coolant passages in the M45 can accumulate debris or rust over time, which can lead to overheating. AMSOIL antifreeze and coolant solutions provide robust protection against rust and corrosion, ensuring the cooling system remains clean and effective.
Complete Lubricant Coverage for the Infiniti M45
Maintaining this vehicle requires attention to all fluid systems. The engine oil capacity for the VK45DE engine is 5.8 quarts when changing the filter, requiring a precise amount to ensure the oil level is correct without overfilling. The oil filter plays a crucial role in this process; a high-quality filter like the AMSOIL Oil Filter captures microscopic contaminants that can cause premature wear. The WIX Oil Filter is also a strong alternative, providing premium media that improves upon OEM standards.
For the cooling system, the M45 requires a full capacity of approximately 11 quarts of coolant. Whether you choose the pre-mixed Passenger Car & Light Truck Antifreeze or the concentrated Propylene Glycol option, proper mixing and filling are essential to prevent freezing in winter and overheating in summer. The differential and transfer case also require specific attention. The front differential holds 1.4 pints and the rear differential holds 3 pints, both of which can benefit from the extreme pressure protection offered by SEVERE GEAR synthetic gear lubes. These gear oils resist thermal runaway and protect limited-slip components better than traditional mineral oils.
Finally, do not overlook the brake and power steering systems. The DOT 3 and DOT 4 synthetic brake fluid ensures consistent pedal feel and ABS responsiveness, while the synthetic power steering fluid helps prevent leaks and keeps the steering mechanism quiet and responsive. For vehicle owners who drive their M45 for long periods, adding AMSOIL P.i. Performance Improver to the fuel tank can restore lost horsepower and improve fuel economy by cleaning the fuel injectors and intake valves.
Vehicle Background
Introduced in 2006 as a 2007 model year vehicle, the Infiniti M45 occupies a unique space in the luxury sedan market. It sits on the same platform as the Nissan Skyline GT-R but is tuned for a different purpose: high-performance luxury rather than pure track racing. The M45 is a mid-size luxury sedan that offers a compelling blend of sportiness and comfort, making it a favorite among enthusiasts who value driving dynamics but refuse to sacrifice passenger space or ride quality.
Under the hood, the 2007 Infiniti M45 is powered by the VK45DE, a 4.5-liter naturally aspirated V8 engine. This engine produces 335 horsepower and 348 lb-ft of torque, delivering ample power for both spirited overtaking on highways and relaxed cruising. The engine is paired with a sophisticated 5-speed automatic transmission that offers smooth, responsive shifting. The M45 was designed to compete directly with German rivals like the Mercedes-Benz E-Class and the BMW 5 Series, offering similar performance characteristics but often with a more relaxed and comfortable ride. The car features a rear-wheel-drive layout with an available all-wheel-drive system in later models, providing excellent traction and handling dynamics.
Owners of the 2007 Infiniti M45 often appreciate its robust build quality and the sheer presence of the V8 engine. The interior is well-appointed with high-quality materials, and the driving experience is characterized by linear power delivery and precise steering. However, like any vehicle of this era and complexity, there are common issues that owners should be aware of. One known problem involves the upper radiator hose connections, which can sometimes develop leaks due to heat cycles. Another potential issue is the deterioration of the air intake pipes, which can crack and cause a vacuum leak. Additionally, some M45 models may experience oil consumption issues, particularly as the vehicle accumulates mileage, often requiring the use of high-mileage specific oils to help manage consumption. A fourth issue involves the variable valve timing (VVT) system, which can occasionally suffer from sludge buildup if synthetic oils are not used regularly. These issues highlight the importance of using high-quality synthetic lubricants to mitigate wear and extend the life of the engine and its components.
By using AMSOIL products, owners can address these potential vulnerabilities proactively. The synthetic motor oils provide superior cleaning power to prevent sludge buildup in the VVT system, while the synthetic power steering fluid helps maintain seal integrity. For those extending the life of their vehicle, the P.i. additive ensures the fuel system remains clean, preventing the carbon buildup that can affect the engine’s performance. Ultimately, the 2007 Infiniti M45 is a capable and rewarding vehicle that deserves the best protection available on the market.
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