What the 2012 Charger delivers in real-world fuel consumption

The 2012 Dodge Charger comes in three engine options, and fuel economy varies significantly between them. The base model uses a 3.6-liter V6 that achieves 17 miles per gallon in the city and 27 on the highway, for a combined 21 mpg. The mid-range 5.7-liter V8 drops to 16 city and 25 highway (19 combined). The high-performance 6.4-liter V8 SRT8 model gets 14 city and 23 highway (17 combined). These figures come from EPA testing and represent what most owners report in normal driving, though real-world results vary based on driving habits and conditions.

The V6 is the most fuel-efficient choice if you prioritize economy. The V8 engines trade efficiency for power—the 5.7-liter produces 370 horsepower, and the 6.4-liter produces 470. If you drive mostly highway, the gap between city and highway numbers matters more than the combined figure, since highway driving will push you closer to those higher numbers.

Key Takeaways

  • The 2012 Charger V6 achieves 21 mpg combined; the 5.7-liter V8 gets 19 mpg combined; the 6.4-liter V8 SRT8 gets 17 mpg combined.
  • Highway driving yields significantly better fuel economy than city driving across all three engines, with a 10 mpg difference on the V6.
  • The 2012 Charger meets EPA Tier 2 emissions standards and uses a catalytic converter and oxygen sensors to reduce tailpipe pollutants.
  • Fuel tank capacity is 18.5 gallons, giving the V6 a theoretical range of around 380 miles per tank under combined conditions.

How the 2012 Charger's emissions control system works

The 2012 Charger uses a three-way catalytic converter to reduce nitrogen oxides, carbon monoxide, and unburned hydrocarbons in the exhaust. Oxygen sensors upstream and downstream of the converter monitor exhaust composition and feed data to the engine control module, which adjusts the air-fuel mixture to keep the converter operating at peak efficiency. This closed-loop system is standard on all 2012 Charger models.

The vehicle also has an evaporative emissions control system that captures fuel vapors from the tank and charcoal canister, preventing them from escaping to the atmosphere. When you refuel, you may notice a slight hissing sound as pressure equalizes—this is normal and part of that system working. The 2012 Charger meets EPA Tier 2 emissions standards, which set limits on tailpipe pollutants but are less stringent than Tier 3 standards introduced in later model years.

Fuel tank capacity and driving range

The 2012 Charger holds 18.5 gallons of fuel. Using the EPA combined figures, a V6 model would travel roughly 380 miles on a full tank, a 5.7-liter V8 around 350 miles, and a 6.4-liter V8 around 315 miles. These are theoretical maximums; actual range depends on your driving style, road conditions, and whether you spend more time in city or highway driving.

The fuel door is on the driver's side rear quarter panel. The vehicle uses a standard threaded fuel cap—not a capless system—so you will hear a click when it seats properly. If the check engine light comes on and you recently refueled, a loose fuel cap is one of the first things to check, as it can trigger an emissions-related code.

Engine oil and maintenance's role in emissions

The 2012 Charger requires 5W-30 motor oil for the V6 and 5W-30 for the V8 models. Using the correct oil viscosity helps the engine run efficiently and reduces emissions; thicker or thinner oil can cause the engine to work harder and produce more pollutants. The recommended oil change interval is 10,000 miles or 12 months, whichever comes first.

A clogged air filter or dirty fuel injectors can also degrade fuel economy and increase emissions. If you notice a drop in mpg or a rough idle, have the air filter inspected and consider a fuel system cleaning. Keeping the engine tuned and the emissions equipment in good working order is the most direct way to maintain the vehicle's environmental performance.

What happens if the check engine light comes on

The check engine light indicates the onboard diagnostic system has detected a fault in the engine, transmission, or emissions system. Common triggers include a loose fuel cap, a faulty oxygen sensor, or a problem with the catalytic converter. You can have the code read for free at many auto parts stores, or you can take the vehicle to a Dodge dealer for a full diagnostic.

If the light is solid (not flashing), the vehicle is usually safe to drive, though you should have it checked within a few days. A flashing check engine light means a serious misfire is occurring and you should stop driving when ready and have it towed. Ignoring emissions-related codes can eventually cause damage to the catalytic converter, which is expensive to replace.

Comparing the 2012 Charger to other full-size sedans

The 2012 Charger's fuel economy sits in the middle range for full-size sedans of that year. A 2012 Chrysler 300 with the same V6 engine achieves similar mileage. A 2012 Ford Taurus with its 3.5-liter V6 gets 18 city and 27 highway (21 combined), slightly better than the Charger V6. A 2012 Chevrolet Impala with a 3.6-liter V6 achieves 18 city and 28 highway (22 combined).

The Charger's V8 options are less common in the full-size sedan class; most competitors offered only six-cylinder engines in 2012. If you want a V8 sedan with similar power, your choices were limited, which partly explains the Charger's appeal to buyers who prioritized performance over economy. The trade-off is clear: more power means lower fuel economy and higher emissions.

Frequently Asked Questions

Does the 2012 Charger have a hybrid or turbo option?

No. The 2012 Charger was offered only with naturally aspirated gasoline engines—the 3.6-liter V6, 5.7-liter V8, or 6.4-liter V8. Dodge did not introduce a hybrid or turbocharged variant of the Charger until later model years. If fuel economy is your priority, the V6 is your only choice.

Can I improve the 2012 Charger's fuel economy with aftermarket parts?

Minor improvements are possible through maintenance—keeping the air filter clean, using the correct oil grade, and ensuring the fuel injectors are clean can help. Aftermarket air intakes or exhaust systems may provide small gains, though they often void the warranty. Driving habits matter more than parts; aggressive acceleration and speeding significantly reduce mpg.

What does the 2012 Charger's emissions rating mean for registration?

The 2012 Charger meets EPA Tier 2 standards and will pass emissions testing in states that require it. Some states have stricter standards and may require Tier 3 or LEV (Low Emission Vehicle) certification; check your state's requirements. The vehicle's age means it may face restrictions in certain areas, but it is legal to register and drive in all 50 states.

How often should I replace the catalytic converter?

A catalytic converter typically lasts 80,000 to 100,000 miles if the engine runs properly. If you ignore check engine lights or drive with a misfire, the converter can fail prematurely. Replacement is expensive—$800 to $1,200 at a dealer—so keeping the engine in good tune is the best prevention.

Is the 2012 Charger's fuel economy better than older Chargers?

Yes. The 2011–2014 generation Charger improved fuel economy compared to the 2006–2010 generation, partly due to better engine management and emissions controls. A 2006 Charger V6 achieved around 17 mpg combined, compared to 21 for the 2012. Newer model years continue to improve, but the 2012 represents a solid step forward for the platform.