Keeping your 2022 Dodge Challenger 6.4L HEMI engine running at peak performance requires more than just regular maintenance; it demands the highest quality synthetic lubricants designed to withstand the extreme demands of modern high-performance vehicles. The 6.4-liter V8 is a powerhouse, but its aggressive nature subjects it to high thermal loads and intense operating conditions that standard synthetic oils often struggle to manage over extended periods. By utilizing precision-formulated AMSOIL products, owners can ensure maximum protection against horsepower loss, wear, and thermal breakdown, allowing the engine to breathe easier and perform reliably whether on the street or the track.
Recommended AMSOIL Products
- AMSOIL Signature Series 0W-40 100% Synthetic Motor Oil – This premium fluid provides superior engine protection against wear and horsepower loss, offering extended service intervals of up to 25,000 miles for severe service.
- AMSOIL Oil Filter – Designed with advanced filtering efficiency and greater contaminant capacity, this filter helps reduce engine wear and allows for lower restriction to keep critical parts lubricated.
- WIX Oil Filter – A premium alternative featuring media improvements over standard OEM-branded filters for reliable filtration during your service interval.
- AMSOIL Passenger Car & Light Truck Antifreeze & Coolant – A unique poly-organic acid formulation that protects all cooling system metals and hoses for up to 150,000 miles or five years.
- AMSOIL Signature Series Fuel-Efficient 100% Synthetic Automatic Transmission Fluid – Withstands the rigors of heavy towing and elevated temperatures while remaining fluid in sub-zero conditions.
- AMSOIL SEVERE GEAR® 75W-90 100% Synthetic Gear Lube – Provides advanced protection against wear and thermal runaway for front and rear differential applications requiring GL-5 specifications.
- AMSOIL SEVERE GEAR® 75W-85 100% Synthetic Gear Lube – An excellent choice for rear standard and limited-slip differentials, controlling thermal runaway and protecting against rust while accommodating friction modifiers.
- AMSOIL DOT 3 and DOT 4 100% Synthetic Brake Fluid – Delivers excellent ABS and traction-control responsiveness with a stable viscosity over a wide temperature range for safe stopping power.
The engine compartment of a Challenger 6.4L is a demanding environment. The 0W-40 viscosity grade is specifically recommended for this engine, with a total capacity of 7.0 quarts including the filter replacement. This thickness ensures that the oil remains robust enough to maintain film strength under the high cylinder pressures of the HEMI engine while flowing quickly to critical components during cold starts. When performing an oil change, remember to check the oil level after the refill to ensure accuracy, and torque the drain plug to the specified 20 ft/lbs to prevent leaks. Pairing this fluid with the AMSOIL Oil Filter creates a complete protection system, where the filter’s capacity for small, wear-causing contaminants significantly reduces long-term engine wear.
Beyond the engine, the cooling system requires attention to prevent overheating, which can be a critical issue in high-output V8s. The recommended capacity for the cooling system is 15.2 quarts. AMSOIL offers two primary options for this application: the ready-to-use Passenger Car & Light Truck Antifreeze & Coolant and the concentrated Propylene Glycol Antifreeze. The proprietary formula used in these coolants is free from phosphates, nitrates, and silicates, ensuring compatibility with all cooling system metals and gaskets while providing protection for up to 150,000 miles. Using a high-quality coolant is essential not just for freezing protection, but for preventing corrosion that can degrade radiators and water pumps over time.
The transmission fluid is another critical component for this vehicle. The 2022 Challenger 6.4L equipped with the 8-speed automatic transmission (8HP70) requires a specific synthetic fluid to handle the torque and heat generated by the HEMI engine. The total fill capacity for the 8-speed 8HP70 transmission is 9 quarts. AMSOIL Signature Series Fuel-Efficient 100% Synthetic Automatic Transmission Fluid is highly recommended, as it is engineered to withstand heavy towing, elevated temperatures, and challenging terrain. It remains fluid in sub-zero temperatures and provides reserve protection during heavy use, ensuring smooth shifts and protecting the transmission from sludge and wear. For those seeking a multi-vehicle fluid, the OE Multi-Vehicle Synthetic Automatic Transmission Fluid is also a viable option that guards against leaks and promotes shudder-free shifts.
Vehicle Background
The 2022 Dodge Challenger is more than just a car; it is a tribute to American muscle car heritage. Reviving the iconic nameplate that dominated the roads in the late 1960s and early 1970s, the Challenger stands as a testament to raw power, aggressive styling, and a commitment to V8 performance. Based on the LX platform, which has been refined over many years, the 2022 model year offers a blend of retro-modern aesthetics and contemporary technology. The specific 6.4-liter HEMI V8 engine featured in this guide is a heartthrob for enthusiasts, delivering substantial horsepower and torque figures that place it firmly in the category of high-performance street machines.
Owners of the Challenger typically appreciate its dual nature: a vehicle that looks as aggressive and imposing as a drag racing strip car but is capable of being driven comfortably as a daily transport. The interior, often equipped with modern infotainment systems and ergonomic designs, contrasts with the muscular exterior lines. The 6.4L engine, in particular, has gained a reputation for being a naturally aspirated powerhouse that delivers a linear and visceral driving experience, distinct from the forced-induction character of the supercharged Hellcat variants. However, this naturally aspirated engine still operates at high stress levels, generating significant heat that places unique demands on the vehicle’s lubrication systems.
While the Challenger is a beloved icon, it is not without its known challenges that can affect longevity and performance if not addressed with proper maintenance. One common issue for owners of high-mileage HEMI engines is valve train wear, particularly on the lifters and camshaft. The use of high-quality synthetic oils with proper anti-wear additives can help mitigate this issue by maintaining a robust oil film during cold starts and high-RPM operation. Another potential concern for owners of these high-performance muscle cars is carbon buildup, especially on engines with Gasoline Direct Injection (GDI) technology. Over time, this carbon can restrict airflow and reduce power, but the regular use of AMSOIL P.i. Performance Improver can help keep injectors clean and restore lost horsepower.
A third area where proper lubrication makes a significant difference is in the sealing systems. As the vehicle ages, the rubber seals and gaskets in the engine can harden, leading to oil leaks. AMSOIL’s specialized formulations contain seal conditioning agents that help prevent the drying and hardening of these rubber components, maintaining their flexibility and preventing leaks that can lead to low oil levels and potential engine damage. Finally, transmission fluid degradation is a common problem in high-torque vehicles. The heavy loads placed on the 8-speed transmission by the HEMI engine can cause the fluid to break down, leading to shuddering or harsh shifts. Synthetic transmission fluids with advanced friction modifiers can extend the life of the transmission and maintain smooth operation, ensuring that the power generated by that 6.4L engine is transferred efficiently to the road.