Maintaining your 2021 Dodge Challenger 5.7L V8 requires precise lubrication choices to ensure longevity and peak performance. This powerful engine, known as the Hemi, operates under significant thermal stress, especially during spirited driving or towing. Using the correct viscosity and synthetic formulations protects critical components from wear, reduces the risk of oil coking in turbocharged applications, and extends service intervals compared to conventional oils.
Recommended AMSOIL Products
- AMSOIL Signature Series 5W-20 100% Synthetic Motor Oil – The top-tier choice offering up to 25,000 miles of protection and superior resistance against horsepower loss.
- AMSOIL Extended-Life 5W-20 100% Synthetic Motor Oil – Provides 20,000 miles of protection with enhanced cleaning power to maintain engine smoothness.
- AMSOIL OE 5W-20 100% Synthetic Motor Oil – An excellent value option that fights sludge and deposits while meeting industry standards.
- AMSOIL 5W-20 100% Synthetic High-Mileage Motor Oil – Formulated specifically for engines with over 75,000 miles to boost detergency and reduce sludge.
- AMSOIL Oil Filter – Delivers 99% filtration efficiency at 20 microns with greater capacity for contaminants to extend engine life.
- WIX Oil Filter – A premium media alternative that offers improvements over original equipment manufacturer-branded filters.
- AMSOIL Passenger Car & Light Truck Antifreeze & Coolant – A durable 50/50 pre-mix formulation protecting against corrosion for up to 150,000 miles.
- AMSOIL Propylene Glycol Antifreeze and Engine Coolant – A concentrated option for heavy-duty protection lasting up to 150,000 miles in passenger cars.
- AMSOIL Signature Series Fuel-Efficient 100% Synthetic Automatic Transmission Fluid – Withstands heavy towing, elevated temperatures, and challenging terrain with reserve protection.
- AMSOIL OE Fuel-Efficient 100% Synthetic Automatic Transmission Fluid – Protects against wear and ensures excellent cold-weather performance for smooth shifting.
- AMSOIL Signature Series Multi-Vehicle 100% Synthetic Automatic Transmission Fluid – Provides reliable protection for power steering systems and transmissions across various vehicle types.
- AMSOIL OE Multi-Vehicle 100% Synthetic Automatic Transmission Fluid – Guards against leaks and promotes shudder-free shifts with a formulation that resists sludge.
- AMSOIL DOT 3 and DOT 4 100% Synthetic Brake Fluid – Ensures excellent ABS and traction-control responsiveness with stable viscosity across temperature ranges.
- AMSOIL SEVERE GEAR® 75W-90 100% Synthetic Gear Lube – Ideal for the front differential, offering advanced wear protection and thermal control for limited-slip applications.
- AMSOIL 75W-90 Long Life 100% Synthetic Gear Lube – Engineered for extended service life with improved seal life and cold-weather shifting capabilities.
- AMSOIL SEVERE GEAR® 75W-110 100% Synthetic Gear Lube – A heavy-duty option for demanding conditions, providing superior protection against rust and corrosion.
- AMSOIL SEVERE GEAR® 75W-85 100% Synthetic Gear Lube – Perfect for the rear standard and limited-slip differentials, helping to reduce operating temperatures and protect seals.
- AMSOIL P.i.® Performance Improver Gasoline Additive – Restores up to 14% horsepower and cleans GDI fuel injectors to prevent carbon buildup.
Engine Oil and Filter Specifications
The heart of your 2021 Dodge Challenger is the 5.7L Hemi V8. For this engine, the recommended oil viscosity is 5W-20 for all temperatures. The system requires 7.0 quarts of oil, including the filter replacement. After refilling, you must check the oil level to ensure proper lubrication coverage. When performing an oil change, be sure to torque the oil drain plug to 20 ft-lbs to prevent leaks or damage to the pan threads.
Among the options available, the AMSOIL Signature Series 5W-20 stands out for maximum protection, offering up to 25,000 miles between changes. It is designed to fight the specific wear patterns associated with high-horsepower engines and is 75% more resistant to horsepower loss compared to standard oils. For those seeking extended intervals without the top-tier price point, the AMSOIL Extended-Life 5W-20 guarantees 20,000 miles of protection and offers superior cleaning power to keep the engine running smoother over time.
If your vehicle is a daily driver with high mileage, the AMSOIL 5W-20 High-Mileage motor oil is the ideal choice. Designed for engines with over 75,000 miles, it features a boosted detergent package that reduces sludge by 67%. This helps the engine perform better and last longer by keeping critical internal passages clear. For owners who prefer a budget-friendly synthetic option that still outperforms conventional oils, the AMSOIL OE 5W-20 provides reliable protection against deposits and is trusted by professional engine builders.
Matching the oil with a high-quality filter is just as crucial. The AMSOIL Oil Filter (EA15K50) provides 99% filtration efficiency at 20 microns. Its design allows for lower restriction, ensuring that critical engine parts remain lubricated even under high load. The filter also offers greater capacity for small, wear-causing contaminants compared to competing filters, helping to reduce overall engine wear and extend the service life of the oil itself. Alternatively, the WIX Oil Filter (57060) utilizes premium media that offers improvements over standard OEM-branded filters, ensuring clean oil circulates through your engine.
Transmission and Differential Lubrication
The 2021 Challenger typically utilizes the 8-speed automatic transmission (8HP70). For this gearbox, the total fill capacity is 9 quarts. Using the correct fluid is essential for maintaining shift quality and preventing wear under the torque load of the Hemi engine. AMSOIL Signature Series Fuel-Efficient Automatic Transmission Fluid is engineered to withstand the rigors of heavy towing and elevated temperatures while remaining fluid in sub-zero conditions. It provides reserve protection during periods of heavy use or abuse, making it a top choice for performance enthusiasts.
The AMSOIL OE Fuel-Efficient Automatic Transmission Fluid is another excellent choice, protecting against wear and ensuring excellent cold-weather performance. It guards against leaks and promotes shudder-free shifts, contributing to a smoother driving experience. For power steering systems or other applications requiring multi-vehicle fluid, the AMSOIL Signature Series Multi-Vehicle Automatic Transmission Fluid and AMSOIL OE Multi-Vehicle Automatic Transmission Fluid provide robust protection against sludge and harsh operating conditions.
Differential lubrication is also vital for the Challenger’s performance. The front standard differential (175 FIA) requires 75W-90 synthetic oil, with a capacity of approximately 1.3 pints. The AMSOIL SEVERE GEAR® 75W-90 is the recommended fluid here, featuring friction modifiers for limited-slip applications and advanced protection against wear and thermal runaway. It helps reduce operating temperatures and protects seals for long equipment life.
For the rear differentials, capacities vary by axle. The 195 rear axle requires 1.5 pints of 75W-85, while the 230 rear axle requires 2.3 pints. Both standard and limited-slip 230 axles also use 75W-85 synthetic fluid. AMSOIL SEVERE GEAR® 75W-85 is specifically recommended for these rear axles. It controls thermal runaway, protects against rust and corrosion, and helps reduce operating temperatures. The friction modifiers included in this lube ensure smooth operation in limited-slip applications, preventing the chattering often associated with differential bind.
Cooling and Brake Systems
The cooling system for the 2021 Challenger 5.7L holds 14.7 quarts of coolant. Maintaining the correct antifreeze is essential to prevent corrosion and overheating, which can be catastrophic in a high-compression V8. AMSOIL Passenger Car & Light Truck Antifreeze & Coolant is a unique poly-organic acid (OAT) formulation that exceeds original equipment requirements. It protects all cooling system metals, gaskets, and hoses for up to 150,000 miles or five years. If you prefer a concentrated option, the AMSOIL Propylene Glycol Antifreeze and Engine Coolant offers similar longevity and protection, requiring mixing with distilled water.
Braking performance is a safety critical feature of any muscle car. The Challenger relies on hydraulic brake fluid, specifically a Mopar DOT 3 type. AMSOIL DOT 3 and DOT 4 100% Synthetic Brake Fluid provides excellent ABS and traction-control responsiveness. It maintains a stable viscosity over a wide temperature range, ensuring consistent pedal feel and stopping power even during repeated hard braking scenarios where brake fluid can get very hot.
About the Vehicle
The 2021 Dodge Challenger represents the continuation of a legendary nameplate that has become an icon of American automotive design. Originating as a retro-styled interpretation of the classic muscle cars of the late 1960s, the Challenger has evolved into a modern performance machine that combines retro aesthetics with cutting-edge technology. The platform, shared with the Dodge Charger, is built at the Brampton Assembly Plant in Ontario, Canada, and serves as a key pillar in Dodge’s lineup alongside the more aerodynamic Charger.
When equipped with the 5.7L Hemi V8 engine, the Challenger delivers a raw, visceral driving experience that has captivated drivers for years. This engine code [T] EZC T is celebrated for its robust torque curve and the unmistakable sound that defines the Hemi brand. The vehicle is designed for both straight-line speed and daily drivability, featuring a spacious cabin that belies its performance-oriented nature. It sits firmly in the market as a preferred choice for enthusiasts who value traditional muscle car characteristics—rear-wheel drive, a powerful naturally aspirated engine, and a bold interior design—over the turbocharged four-cylinder options found in competitors.
While the Challenger is renowned for its reliability in the muscle car segment, owners often encounter specific maintenance needs that are best addressed with high-performance synthetic lubricants. One common issue among higher-mileage Challengers is oil consumption or sludge buildup, particularly if the vehicle has been subjected to track use or aggressive driving. The enhanced detergents in AMSOIL High-Mileage oils directly combat these tendencies, keeping the engine clean and preventing varnish deposits that can affect variable valve timing components.
Another area of concern for Challenger owners is transmission wear, especially in models used for towing or spirited driving. The heat generated during spirited driving can degrade conventional transmission fluid, leading to shuddering or rough shifts over time. Synthetic transmission fluids provide a more stable viscosity at high temperatures, preserving the integrity of the seals and clutches inside the 8-speed transmission. Additionally, differential whine or chatter can develop if the gear lube degrades or if the limited-slip clutch packs begin to wear. Using a synthetic gear lube with the correct friction modifiers helps ensure smooth operation and extends the life of the rear axle components, preventing the costly repairs associated with worn differentials. Finally, brake fade can be a concern on canyon roads or race tracks; synthetic brake fluid with a higher boiling point ensures that the braking system remains responsive under extreme heat, maintaining the safety and control drivers expect from their muscle car.
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