Maintaining the health of your 2007 Dodge Charger equipped with the 5.7L V8 engine requires a disciplined approach to lubrication. The H engine code designates a specific powerplant featuring the Multiple Displacement System (MDS), which demands precise viscosity and additive packages to ensure longevity and performance. Using the wrong fluid can lead to accelerated wear, sludge buildup, or transmission failure, so selecting the correct AMSOIL products is essential for protecting your investment in this muscle car.
Recommended AMSOIL Products
- AMSOIL Signature Series 5W-20 100% Synthetic Motor Oil – Offers the highest level of protection against horsepower loss and wear, extending intervals up to 25,000 miles.
- AMSOIL Extended-Life 5W-20 100% Synthetic Motor Oil – Provides a balanced performance option with enhanced cleaning power for up to 20,000 miles.
- AMSOIL OE 5W-20 100% Synthetic Motor Oil – An economical choice that outperforms conventional oils and effectively fights sludge and deposits.
- AMSOIL 5W-20 100% Synthetic High-Mileage Motor Oil – Specifically formulated for engines with over 75,000 miles to reduce sludge and oil consumption.
- AMSOIL Oil Filter – Features premium filtration efficiency to remove contaminants and extend service life in sync with synthetic oils.
- WIX Oil Filter – A premium media alternative that offers improvements over standard OEM-branded filters.
The engine oil specification for this vehicle is critical due to the presence of the 5.7L H engine with the Multiple Displacement System. Owners must use SAE 5W-20 oil regardless of temperature. The system requires a capacity of 7 quarts when a filter change is included. After refilling, it is important to check the oil level to ensure accuracy. The oil drain plug torque specification is 20 ft/lbs. By choosing one of the AMSOIL 5W-20 synthetic blends, you ensure optimal flow at start-up and stability at high temperatures, which is vital for the V8 powertrain.
Beyond the engine, the transmission of the 2007 Dodge Charger requires specific attention. The 5-speed automatic transmission (NAG1) is a robust unit but benefits significantly from high-quality synthetic fluid. The total fill capacity for a complete change is 8.1 quarts, while an initial fill requires 5.3 quarts. The transmission fluid also serves a dual purpose, as it is recommended for the power steering system. Using a fluid that can handle heavy towing, elevated temperatures, and cold starts is key to preventing shudder and wear. The AMSOIL Signature Series Multi-Vehicle 100% Synthetic Automatic Transmission Fluid and the AMSOIL OE Multi-Vehicle 100% Synthetic Automatic Transmission Fluid are both excellent choices for this application, providing reserve protection during abuse and ensuring smooth, shudder-free shifts.
Cooling system maintenance is equally important for preventing overheating, which can be a stressor on older engines. The 2007 Charger’s cooling system holds a capacity of 14.6 quarts. AMSOIL Passenger Car & Light Truck Antifreeze & Coolant and AMSOIL Propylene Glycol Antifreeze and Engine Coolant are the options available: a pre-mixed ethylene glycol formulation for passenger cars and light trucks, and a concentrated propylene glycol formula. The pre-mixed Antifreeze & Coolant is engineered to exceed original equipment manufacturer requirements and offers protection for up to 150,000 miles or 5 years. For those preferring a concentrate that mixes with distilled water, the Propylene Glycol Antifreeze offers extended service life up to 150,000 miles as well. Both formulations are free of phosphates, nitrates, and other harsh chemicals that can corrode cooling system metals and hoses.
Differential lubrication varies depending on the specific rear end axle installed in your vehicle, which can be a 175mm FIA or a larger 198mm, 210mm, or 215mm unit. For the front differential (175mm FIA), the capacity is 1.3 pints, requiring a 75W-90 GL-5 lubricant. AMSOIL SEVERE GEAR® 75W-90 100% Synthetic Gear Lube is a top recommendation here, as it controls thermal runaway and protects against rust and corrosion. For the rear differential, the viscosity depends on the axle size. The 198mm, 210mm, and 215mm rear axles generally require 75W-140 GL-5 lubricant. The capacity ranges from 2.5 to 3.4 pints depending on the specific housing. The AMSOIL SEVERE GEAR® 75W-140 100% Synthetic Gear Lube provides advanced protection against wear, helps reduce operating temperatures, and contains friction modifiers for limited-slip applications. Alternatively, the AMSOIL 75W-90 Long Life 100% Synthetic Gear Lube is an option for those seeking extended service intervals, though the 75W-140 is preferred for the heavier loads typically handled by the rear axle.
Fluid safety extends to the braking system as well. The vehicle requires a DOT 3 hydraulic brake fluid. AMSOIL DOT 3 and DOT 4 100% Synthetic Brake Fluid is designed to provide excellent ABS and traction-control responsiveness. It maintains stable viscosity over a wide temperature range, which is crucial for consistent stopping power in emergency situations. Additionally, for vehicle storage, AMSOIL Gasoline Stabilizer can be used to keep fuel fresh for up to 12 months, protecting against varnish and gum buildup, while the AMSOIL Engine Fogging Oil offers rust prevention for internal components during long periods of inactivity.
Vehicle Background
The 2007 Dodge Charger represents a significant moment in the history of American automotive design. This model marked the return of the Charger nameplate to a full-size sedan platform, sharing its architecture with the Chrysler 300 and Dodge Magnum. The vehicle is renowned for its aggressive styling, which blends classic muscle car cues with modern proportions. The 5.7L Hemi V8 engine, identified by the engine code [H], is the heart of the performance version of this sedan. This powerhouse delivers substantial horsepower and torque, making it a favorite for enthusiasts who appreciate straight-line acceleration and a visceral driving experience.
Owners of the 2007 Charger often cite its powerful engine and distinctive aesthetic as primary reasons for keeping it on the road. However, the vehicle’s age and driving dynamics also introduce specific challenges that proper lubrication can help mitigate. One common issue with the 5.7L Hemi engine from this era is oil consumption, often exacerbated by wear in the piston rings over time. As the engine accumulates miles, the gap in the rings widens, allowing oil to pass into the combustion chamber. Switching to a dedicated High-Mileage formulation or a synthetic oil with enhanced anti-wear additives can help seal the gap slightly and reduce oil burn-off, keeping the oil level stable and the engine cleaner.
Another known problem area for this vehicle is the cooling system’s susceptibility to overheating, particularly if the original coolant is not replaced regularly. The complex cooling passages and the plastic components within the system can degrade with age. Using a high-quality antifreeze like the AMSOIL Passenger Car & Light Truck Antifreeze ensures that the cooling system remains protected against corrosion and erosion. This is vital because the Hemi engine generates significant heat, and maintaining optimal temperature prevents warped heads and blown head gaskets, which are costly repairs. The high-temperature stability of these synthetic coolants ensures that the engine operates within safe limits even during summer traffic or spirited driving.
The transmission in the 2007 Charger, while robust, can develop shudder issues, especially under load or when towing. This is often a result of the fluid losing its frictional properties over time. Synthetic automatic transmission fluid can resist the formation of sludge and varnish that leads to valve sticking and harsh shifting. By using a premium synthetic transmission fluid, owners can promote smoother shifts and extend the life of the torque converter clutch, effectively eliminating or reducing the shudder sensation that plagues many of these vehicles as they age. This is particularly important for those who utilize the vehicle for heavy-duty tasks, as the fluid must withstand elevated temperatures without breaking down.
Finally, the differential units in the Charger are subjected to significant torque and stress, especially in models with limited-slip differentials. The friction modifiers in standard gear oils can wear out, leading to binding and chattering when turning. Synthetic gear lubricants contain advanced friction modifiers that provide consistent performance in both wet and dry conditions. This ensures that the differential operates smoothly, preventing the “wind-up” sensation that can occur during tight turns with conventional oils. By selecting the appropriate gear lube for the specific axle size, owners can maintain precise handling characteristics and protect the expensive differential components from premature wear.