The 2012 Charger SRT8 is a high-performance sedan built around a 6.4-litre V8 engine

The 2012 Dodge Charger SRT8 is a four-door muscle car that sits at the top of Dodge's performance lineup. It produces 470 horsepower and 470 pound-feet of torque from its naturally aspirated 6.4-litre V8 engine. That engine is paired with a five-speed automatic transmission and rear-wheel drive. The car accelerates from 0 to 60 mph in roughly 3.9 seconds and has a top speed of 175 mph, making it one of the fastest four-door sedans available in its year.

The SRT8 badge stands for Street and Racing Technology, Dodge's performance division. The 2012 model was the final year of the fifth-generation Charger platform before a complete redesign arrived in 2015. This particular generation is known for its aggressive styling, large displacement engine, and straightforward mechanical design—qualities that appeal to owners who want raw power without modern complexity.

Key Takeaways

  • The 2012 SRT8 uses a 6.4-litre V8 with 470 horsepower and requires premium fuel (91 octane or higher) to run properly.
  • Fuel economy is poor by modern standards, averaging 14 to 16 mpg combined, so budget accordingly for fuel costs.
  • The transmission is a five-speed automatic, not a manual, which was unusual for performance cars of that era and affects how the engine feels during acceleration.
  • Maintenance costs are higher than a standard Charger because the V8 engine, cooling system, and brakes are all built for sustained high performance.
  • Common wear items include the spark plugs (which need replacement every 30,000 miles), transmission fluid, and brake pads, all of which wear faster under spirited driving.

Engine and Performance Specifications

The 6.4-litre V8 is a carryover from earlier SRT8 models and is one of the largest naturally aspirated engines Dodge produced. It breathes through a cold-air intake and exhaust manifolds designed for flow. The engine block is cast iron, and the cylinder heads are aluminum, which is a common pairing in performance engines because it balances durability with weight savings.

The five-speed automatic transmission was a point of criticism when the car was new because competitors like the Chevrolet SS offered six-speed automatics or manual options. The five-speed means the engine spends more time at higher RPM on the highway, which contributes to the poor fuel economy. However, the transmission itself is robust and holds the power well when properly maintained.

Fuel consumption is a real consideration. The EPA rated the 2012 SRT8 at 14 mpg city and 16 mpg highway, which translates to roughly 15 mpg combined. Real-world numbers vary based on driving style—aggressive acceleration and highway speeds above 70 mph will pull the average down further. The car requires premium fuel (91 octane minimum, 93 recommended) to prevent engine knock and maintain the rated horsepower.

Cooling System and Thermal Management

The 6.4-litre V8 produces significant heat, so the 2012 SRT8 uses a large radiator, electric cooling fans, and a heavy-duty water pump. The cooling system is pressurized to 16 psi, which raises the boiling point of the coolant and helps the engine shed heat more efficiently. This is standard for high-output engines but means the system must be treated with respect—never open the radiator cap when the engine is hot.

Coolant should be flushed every 30,000 miles or as recommended in the owner's manual. Using the correct coolant type (Mopar coolant or equivalent) is important because mixing types can cause chemical reactions that clog the system. The thermostat typically lasts 60,000 to 100,000 miles but can fail suddenly, causing overheating or a stuck-open condition that prevents the engine from reaching operating temperature.

If you live in a hot climate or plan to drive the car hard, pay attention to coolant temperature. The SRT8 has a temperature gauge on the dashboard. If it climbs above the midpoint, reduce speed and let the engine cool. Overheating can warp the cylinder heads and cause internal damage that is expensive to repair.

Transmission Maintenance and Fluid Changes

The five-speed automatic transmission in the 2012 SRT8 is a Chrysler TorqueFlite design that has proven reliable when maintained. Transmission fluid should be changed every 30,000 to 60,000 miles, depending on driving conditions. The owner's manual specifies Mopar ATF+4 fluid; using a different type can affect shift quality and transmission longevity.

A transmission fluid change involves draining the pan, replacing the filter, and refilling. Some shops recommend a full flush using a machine, which circulates new fluid through all passages. A flush costs more but removes more of the old, degraded fluid. If you tow, drive in stop-and-go traffic frequently, or drive the car hard, lean toward the shorter interval (30,000 miles) and consider a flush every other change.

Signs of transmission trouble include delayed shifts, slipping (a sensation of the engine revving without the car accelerating), or a burning smell. If you notice any of these, have the transmission inspected when ready. Transmission repairs are expensive, and catching problems early can mean the difference between a fluid change and a rebuild.

Brake System and Stopping Power

The 2012 SRT8 comes with Brembo brakes—large four-piston calipers in front and two-piston calipers in the rear, paired with vented rotors. These brakes are designed to handle the car's weight and performance. The front brake pads are thicker than standard Charger pads and wear faster under hard braking, especially if you drive the car spiritedly or on a track.

Brake fluid should be inspected annually and flushed every two years or 30,000 miles. Brake fluid is hygroscopic, meaning it absorbs moisture from the air. Over time, this moisture lowers the boiling point of the fluid, which can cause brake fade during hard braking. Fresh fluid maintains stopping power and protects the internal components of the brake system from corrosion.

Brake rotors typically last 50,000 to 70,000 miles, but this varies based on driving style. Hard braking, towing, or frequent mountain driving accelerates rotor wear. If you hear a grinding sound when braking, the pads have worn through to the rotor, and both pads and rotors need replacement when ready. Continuing to drive with metal-on-metal contact can damage the calipers.

Spark Plugs and Ignition System

The 2012 SRT8 uses eight spark plugs (one per cylinder) that should be replaced every 30,000 miles. The engine bay is tight, and accessing all eight plugs requires removing intake manifold components on some cylinders. This is a job many owners take to a shop rather than attempt at home, though it is not impossible for someone with mechanical experience.

Use the spark plug type specified in the owner's manual—typically a premium plug with a platinum or iridium center electrode. These plugs last longer than standard copper plugs and maintain a more consistent spark as they age. The ignition coils sit directly on top of each spark plug and rarely fail, but if the engine misfires or runs rough, a faulty coil is worth checking.

Ignition timing is computer-controlled and cannot be adjusted manually. If the engine knocks or pings under load, the most common cause is using fuel with an octane rating lower than 91. Switch to premium fuel and the problem usually disappears. If knocking persists with premium fuel, have the engine scanned for fault codes, as a faulty knock sensor or carbon buildup can also cause the issue.

Suspension and Handling Characteristics

The 2012 SRT8 uses a double-wishbone front suspension and a multi-link independent rear suspension, both tuned for performance. The suspension is stiffer than a standard Charger's, which improves handling but also means the car transmits more road texture to the cabin. Bumps and potholes are felt more directly, which is the trade-off for better cornering grip.

Suspension components wear faster under hard driving or on rough roads. Struts typically last 50,000 to 80,000 miles. Control arm bushings, which are rubber components that allow the suspension to move, can crack or deteriorate and cause clunking noises or a vague steering feel. If you notice the car pulling to one side, bouncing excessively, or making noise over bumps, have the suspension inspected.

Wheel alignment should be checked annually or whenever you notice uneven tire wear or steering pull. The SRT8's aggressive suspension geometry means it is more sensitive to alignment than a standard sedan. Proper alignment improves handling, extends tire life, and ensures the brakes work evenly.

Tire Selection and Wear Patterns

The 2012 SRT8 comes equipped with performance tires, typically Goodyear Eagle F1 or similar brands designed to handle the car's power and weight. These tires are softer and stickier than all-season tires, which means they grip better but wear faster. Expect to replace them every 25,000 to 40,000 miles depending on driving style and road conditions.

Tire pressure should be checked monthly and adjusted to the specification on the driver's door jamb (not the sidewall of the tire). Under-inflated tires wear faster on the edges and reduce fuel economy. Over-inflated tires wear faster in the center and reduce grip. Proper pressure is a straightforward maintenance task that extends tire life and improves handling.

If you drive the car hard or on a track, consider rotating tires every 5,000 to 7,000 miles. The SRT8's rear-wheel-drive layout means the rear tires wear differently than the front, and rotation helps even out wear. Some owners also upgrade to higher-performance tires or track-specific compounds if they plan to use the car on a circuit.

Frequently Asked Questions

What is the difference between the 2012 SRT8 and a regular Charger R/T?

The SRT8 has a larger 6.4-litre V8 with 470 horsepower versus the R/T's 5.7-litre V8 with 370 horsepower. The SRT8 also has upgraded brakes, a stiffer suspension, and performance-tuned steering. The SRT8 is faster and handles better but costs more to maintain and gets worse fuel economy.

Can I use regular fuel instead of premium in the 2012 SRT8?

You can, but you should not. Regular fuel (87 octane) will cause engine knock, which triggers the knock sensor to retard ignition timing. This reduces power output and can damage the engine over time. Premium fuel (91 octane or higher) is required to run the engine at its rated performance and prevent internal damage.

How often should I change the oil in a 2012 SRT8?

Dodge recommends an oil change every 10,000 miles or annually, whichever comes first. Use the oil grade specified in the owner's manual (typically 5W-20 or 10W-30). If you drive the car hard or in dusty conditions, consider changing oil every 5,000 miles to keep the engine cleaner and reduce wear.

Is the 2012 SRT8 reliable for daily driving?

Yes, the SRT8 is reliable for daily driving if maintained properly. The engine and transmission are proven designs. However, fuel costs, maintenance expenses, and the firm suspension make it less practical than a standard Charger. Plan for higher fuel bills and more frequent brake and tire replacements if you drive it regularly.

What should I look for when buying a used 2012 SRT8?

Check the service history to confirm regular oil changes, transmission fluid changes, and spark plug replacements. Listen for engine knock or transmission slipping. Inspect the brakes for wear and the suspension for clunking or excessive play. A pre-purchase inspection by a Dodge specialist is worth the cost to catch hidden problems before you buy.