Fuel Economy and Engine Options for the 2010 Dodge Charger

The 2010 Dodge Charger came with three engine choices, and which one you own determines how much fuel it will use. The base model had a 3.5-liter V6 engine that achieved roughly 25 miles per gallon on the highway and 17 miles per gallon in city driving. The mid-range option was a 5.7-liter V8 that got about 23 miles per gallon on the highway and 15 in the city. The high-performance R/T model used the same 5.7-liter V8 but with different tuning, delivering similar fuel economy numbers.

All three engines paired with a five-speed automatic transmission. The V6 was the most fuel-efficient choice if you were concerned about gas costs, while the V8 engines offered more power at the expense of higher fuel consumption. These numbers assume normal driving conditions; actual mileage varies based on how you drive, road conditions, and how well you maintain the vehicle.

Key Takeaways

  • The 2010 Charger's V6 engine delivered better fuel economy at around 17 city and 25 highway miles per gallon compared to the V8 options.
  • Both V8 engines in the 2010 Charger achieved roughly 15 city and 23 highway miles per gallon, with the difference between standard and R/T models being minimal.
  • All 2010 Chargers used a five-speed automatic transmission paired with their respective engines.
  • Real-world fuel economy depends on driving habits, maintenance, and conditions, so these EPA estimates may not match what you see at the pump.

Emissions Standards and Regulatory Compliance

The 2010 Dodge Charger met the emissions standards in place at the time of manufacture. All models included a catalytic converter and an onboard diagnostic system designed to monitor emissions-related components and alert you if something malfunctions. The vehicle was built to comply with federal Environmental Protection Agency (EPA) standards and state regulations, including California's stricter standards if it was sold in that state.

The emissions control system works continuously while the engine runs. If a component fails—such as the oxygen sensor or the catalytic converter—the check engine light will illuminate on your dashboard. This light indicates that the onboard diagnostic system has detected a problem that may affect emissions or engine performance. Having the code read with a diagnostic scanner tells you which component needs attention.

Understanding the EPA Window Sticker Information

When the 2010 Charger was new, it came with an EPA window sticker showing fuel economy estimates and annual fuel cost. That sticker listed the city and highway numbers separately because real driving involves both. The EPA also calculated an estimated annual fuel cost based on average driving of 15,000 miles per year and the national average gas price at the time the vehicle was rated.

The window sticker also included a "fuel economy guide" label that compared the Charger's efficiency to other vehicles in its class. This comparison helped buyers understand whether a particular model was more or less efficient than similar sedans. If you are looking at a used 2010 Charger today, that original sticker may no longer be on the vehicle, but the EPA ratings remain the same.

Maintenance That Affects Fuel Economy and Emissions

Several maintenance tasks directly impact how much fuel your 2010 Charger burns and how clean its emissions are. Keeping the engine oil at the correct level and changing it on schedule reduces friction inside the engine, which improves fuel economy. Using the manufacturer's recommended oil grade matters—using heavier oil than specified can lower your miles per gallon.

The air filter also plays a role. A clogged air filter forces the engine to work harder, increasing fuel consumption and emissions. Replacing it according to your owner's manual keeps the engine running efficiently. Tire pressure is another factor: underinflated tires create more rolling resistance, which means the engine has to work harder and burn more fuel. Check your tire pressure monthly and inflate to the pressure listed on the driver's door jamb, not the maximum pressure on the tire itself.

The spark plugs in your 2010 Charger should be inspected and replaced if worn. Worn plugs cause incomplete combustion, which wastes fuel and increases emissions. Your owner's manual specifies the replacement interval for your particular engine.

What the Check Engine Light Means for Your 2010 Charger

If the check engine light comes on in your 2010 Charger, it means the onboard diagnostic system has detected a problem in the engine, emissions system, or transmission. This light does not always mean the car is unsafe to drive, but it does mean something needs attention. Common causes include a loose gas cap, a faulty oxygen sensor, a failing catalytic converter, or a misfire in one of the cylinders.

The first step is to have the diagnostic trouble code read. Many auto parts stores offer this service for free, or you can take the vehicle to a mechanic or dealership. The code tells you which system is affected and narrows down what needs to be repaired. Ignoring the check engine light can lead to more expensive repairs down the road and may cause your vehicle to fail an emissions test if your state requires one.

Emissions Testing and Your 2010 Charger

Whether your 2010 Charger needs to pass an emissions test depends on your state and local regulations. Some states require all vehicles to pass an annual or biennial emissions inspection, while others test only vehicles in certain age groups or geographic areas. A few states do not require emissions testing at all. Check your state's Department of Motor Vehicles website to learn whether testing is required where you live.

If your state does require testing, your 2010 Charger will be connected to a machine that measures the levels of nitrogen oxides, particulate matter, and other pollutants in the exhaust. The vehicle must stay within the limits set by the EPA for that model year. If it fails, you will need to repair the emissions system before you can register the vehicle. Common reasons for failure include a faulty oxygen sensor, a damaged catalytic converter, or a misfire condition.

Frequently Asked Questions

What gas should I use in a 2010 Dodge Charger?

Check your owner's manual for the minimum octane rating required. Most 2010 Chargers with the V6 engine can use regular 87-octane gasoline. The V8 models may require mid-grade or premium fuel depending on the specific engine tuning. Using lower octane than recommended can cause engine knock and reduce performance, while using higher octane than necessary wastes money with no benefit.

Why is my 2010 Charger getting worse fuel economy than the EPA estimate?

EPA estimates assume moderate driving with a mix of city and highway speeds. If you drive mostly in heavy traffic, accelerate aggressively, or carry heavy loads, your actual fuel economy will be lower. Cold weather also reduces fuel economy because the engine takes longer to warm up. Underinflated tires, a clogged air filter, or worn spark plugs can also decrease efficiency. Check your maintenance and tire pressure first.

Can I drive my 2010 Charger if the check engine light is on?

In most cases, yes, but you should have it diagnosed soon. If the light is flashing rather than steady, the engine is misfiring and you should not drive the vehicle—this can damage the catalytic converter. A steady light indicates a problem that needs attention but is usually not an when ready safety hazard. Get the code read within a few days to understand what needs repair.

What happens if my 2010 Charger fails an emissions test?

You will need to repair the emissions system component that caused the failure before you can register the vehicle. Common repairs include replacing the oxygen sensor, catalytic converter, or spark plugs, or fixing a vacuum leak. After the repair, you may be able to retest at no additional cost within a certain timeframe, depending on your state's rules.