The 2012 Charger SRT8 produces 16 mpg city and 25 mpg highway, with EPA emissions ratings that reflect its 6.4-liter V8 engine

The 2012 Dodge Charger SRT8 is a full-size performance sedan powered by a naturally aspirated 6.4-liter V8 engine producing 470 horsepower. The EPA rates its fuel economy at 16 miles per gallon in city driving and 25 miles per gallon on the highway, with a combined rating of 19 mpg. Real-world mileage varies based on driving habits, road conditions, and maintenance, but most owners report figures close to EPA estimates.

The vehicle's emissions classification places it in the standard tier for its model year under EPA guidelines. The 6.4L engine meets 2012 emissions standards through a combination of engine management systems and catalytic converters, but it does not may have access to for any special low-emissions designation. This means the Charger SRT8 carries no special tax incentives or rebates related to emissions performance.

Key Takeaways

  • The 2012 Charger SRT8 achieves 16 city / 25 highway mpg according to EPA testing, with a combined rating of 19 mpg.
  • The 6.4-liter V8 engine meets standard 2012 emissions requirements but does not may have access to as a low-emissions or alternative-fuel vehicle.
  • Actual fuel economy depends on driving style, traffic conditions, and how well the vehicle is maintained, particularly spark plugs and air filters.
  • The Charger SRT8 does not carry federal tax credits or state incentives tied to fuel economy or emissions performance.

Engine specifications and how they affect fuel consumption

The 6.4-liter V8 is a large-displacement, naturally aspirated engine that prioritizes power output over fuel efficiency. With 470 horsepower and 470 pound-feet of torque, the engine demands premium gasoline (91 octane or higher) to operate at its rated performance. Using regular unleaded fuel can reduce power output and may trigger engine knock, which further reduces efficiency.

The engine pairs with a five-speed automatic transmission that lacks the overdrive ratios found in modern eight- or ten-speed units. This means the engine runs at higher RPMs on the highway than it would in a newer vehicle, which contributes to the 25 mpg highway rating rather than the 28–30 mpg typical of modern performance cars. The transmission does include a manual shift mode, but this feature is primarily for driver engagement rather than fuel savings.

EPA emissions ratings and what they mean for your vehicle

The EPA assigns emissions ratings based on tailpipe output of nitrogen oxides (NOx), particulate matter, and volatile organic compounds (VOCs). The 2012 Charger SRT8 meets Tier 2 Bin 8 standards, which were the baseline requirement for passenger vehicles in 2012. This is not a failing grade—it straightforward means the vehicle meets the legal minimum for its model year and does not exceed it.

The vehicle does not carry a "SULEV" (Super Ultra Low Emissions Vehicle) or "LEV" (Low Emissions Vehicle) badge because it does not exceed the standard by a meaningful margin. States that follow California emissions standards (including New York, Massachusetts, and Vermont) do not impose additional restrictions on 2012 model-year vehicles, so the Charger SRT8 is street-legal everywhere in the United States.

Comparing the 2012 SRT8 to other performance sedans of that era

The 2012 Charger SRT8's 16/25 mpg rating was competitive for large performance sedans at the time. The 2012 Cadillac CTS-V, powered by a 6.2-liter supercharged V8, achieved 14/22 mpg. The 2012 Chrysler 300C with the 5.7-liter V8 achieved 17/25 mpg. The Charger SRT8 sat in the middle of this range, offering more power than the 300C while consuming slightly less fuel than the CTS-V.

Modern performance sedans have improved significantly. A 2024 Dodge Charger R/T with a 5.7-liter V8 achieves 16/25 mpg—identical to the 2012 SRT8—despite producing 370 horsepower (100 fewer than the SRT8). Newer vehicles benefit from direct fuel injection, variable valve timing, and eight-speed transmissions that the 2012 model lacked. If fuel economy is a priority, a newer performance sedan will deliver better results.

Maintenance factors that affect emissions and fuel economy

The 2012 Charger SRT8 requires regular maintenance to keep emissions systems functioning and fuel economy stable. The oxygen sensors monitor exhaust composition and feed data to the engine computer; a failing sensor can cause the check engine light to illuminate and reduce fuel economy by 10 to 15 percent. Spark plugs should be replaced every 30,000 miles, and a fouled set will increase emissions and lower mpg.

The air filter and cabin air filter should be inspected annually and replaced if visibly dirty. A clogged air filter restricts oxygen flow to the engine, forcing it to run rich (too much fuel, not enough air), which increases both emissions and fuel consumption. The catalytic converter should be inspected if the vehicle has been driven through deep water or if you notice a rotten-egg smell from the exhaust, as these are signs of internal damage.

Real-world fuel economy reports from owners

Owner forums and fuel economy tracking sites show that most 2012 Charger SRT8 owners report 17 to 21 mpg combined, slightly above the EPA combined rating of 19 mpg. This variation reflects differences in driving patterns: owners who drive mostly highway miles report figures closer to 25 mpg, while those in heavy city traffic report 14 to 16 mpg. Aggressive acceleration and sustained high-speed driving (above 70 mph) reduce mileage noticeably.

Some owners report that fuel economy improves slightly after the first 10,000 miles as engine components settle and the computer learns driving patterns. Conversely, owners who frequently tow or carry heavy loads report a drop to 14 to 15 mpg combined. The vehicle's curb weight of approximately 4,400 pounds means that payload has a measurable effect on efficiency.

Fuel type and octane requirements

The 2012 Charger SRT8 requires premium gasoline (91 octane minimum, 93 octane recommended). Using regular 87-octane fuel will trigger engine knock and reduce power output by 10 to 15 percent. The engine computer will also adjust timing to prevent knock, which further reduces efficiency. Over time, running on regular fuel can damage the catalytic converter and oxygen sensors.

Premium gasoline costs approximately 20 to 40 cents more per gallon than regular, depending on your region and current market conditions. With a 16 mpg city rating and a 70-liter (18.5-gallon) fuel tank, a driver filling up twice weekly will spend an additional $30 to $60 per month on fuel compared to a vehicle that accepts regular gasoline. This is a real cost to factor into ownership.

Frequently Asked Questions

Can I use regular gasoline in a 2012 Charger SRT8?

The engine is designed for 91-octane premium fuel. Regular 87-octane gasoline will cause engine knock and reduce horsepower. The engine computer will retard timing to prevent damage, which lowers fuel economy further. Occasional use of regular fuel will not permanently damage the engine, but consistent use can harm the catalytic converter and oxygen sensors over time.

What does the check engine light mean on a 2012 SRT8?

The check engine light indicates that one of the emissions system sensors has detected a problem. Common causes include a loose gas cap, a failing oxygen sensor, or a catalytic converter issue. You will need a diagnostic scanner to read the specific error code. Do not ignore the light, as a malfunctioning emissions system can reduce fuel economy by 10 to 20 percent.

Is the 2012 Charger SRT8 legal to drive in California?

Yes. The 2012 Charger SRT8 meets federal emissions standards and is street-legal in all 50 states, including California. It does not carry a special low-emissions certification, but it does not need one to be registered and driven. You will pass a standard smog check if the vehicle is properly maintained and the check engine light is not illuminated.

How much does it cost to fill up a 2012 Charger SRT8?

The fuel tank holds 18.5 gallons. At current premium gasoline prices (which vary by region), a full tank typically costs $65 to $85. With a 19 mpg combined rating, you can expect to drive approximately 350 miles per tank. Budget for fuel as a significant ownership cost, especially if you drive in city traffic where the 16 mpg city rating applies.

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

The SRT8 uses a 6.4-liter V8 with 470 horsepower and achieves 16/25 mpg. The R/T uses a 5.7-liter V8 with 370 horsepower and achieves 17/25 mpg. The SRT8 produces more power but consumes slightly more fuel in city driving. Both meet the same emissions standards and require premium gasoline.