The Dodge Challenger with the 5.7-liter HEMI V-8 engine offers impressive fuel efficiency for a performance vehicle. Equipped with an automatic transmission, this powerhouse delivers an EPA-estimated mileage of 16 MPG in the city and 25 MPG on the highway. Tailpipe Emissions. 8.1 tons CO 2. Challenger T/A 392. vs. 6.5 tons. Avg. Large Car. Yearly estimate based on your driving miles. Learn more about 2018 Dodge Challenger. See all for sale. Tune-ups help to keep your car running smoothly and can improve fuel economy by up to 4%. Over to you! The list of vehicles featuring 5.7L is long. It includes Chrysler 300C, Jeep® Grand Cherokee, Dodge Durango, Ram pickup trucks, and Dodge Challenger R/T and Charger R/T models. The use of 89 octane "Plus" gasoline is recommended for optimum performance and fuel economy. 2019 Dodge Challenger R/T Scat Pack 2021 Dodge Challenger R/T Black Top addition (R.I.P. 12/31/2023) Everything you need to know about each trim in the 2015 Dodge Challenger lineup, all in one place. Fuel Economy: City 19/Hwy 30/Comb 23 MPG. City 19/Hwy 30/Comb 23 MPG. City 16/Hwy 25/Comb 19 MPG. The use of 91 or higher octane “Premium” gasoline is required in these engines. Looks like up to 15% ethanol is fine. Chances are the amount of ethanol will be less than 15%. With "10%" ethanol my info is refiners erred on the side of caution and the actual percentage of ethanol is in the 7% to 8% range. The Dodge Challenger R/T Plus with a 5.7 Liter V8 engine sounds mean, looks meaner, but gets surprisingly good gas mileage for such a large powerplant. Posted: April 17, 2021 - 6:15PM Author The 3.5L and 5.7L engines (with automatic. transmission) are designed to meet all. emissions regulations and provide satisfactory. fuel economy and performance when. using high-quality unleaded gasoline having. an octane range of 87 to 89. The manufacturer. recommends the use of 89 octane for optimum. performance. The 2015 Dodge Challenger SRT Hellcat debuts with a supercharged 6.2-liter Hemi V8 capable of an incredible 707 horsepower. EPA city/highway fuel economy: 19/30 mpg. 5.7-liter Hemi V8 372 Used 2014 Dodge Challenger Performance and Interior . The 2014 Dodge Challenger’s base engine is a Pentastar V6 that produces 305 horsepower. Two Hemi V8 engines are available: R/T models have a 5.7-liter that makes 372 or 375 horsepower (depending on the transmission), while the 6.4-liter in the SRT8 puts out a whopping 470 horsepower. 6EzLR.