The 2023 Dodge Challenger is a blast from the past, 2021 Dodge Challenger SXT RWD Features and Specs. Year * 2021. EPA Fuel Economy Equivalent (for hybrid and electric vehicles), combined 45 % Highway Cost to Drive $154 /month Challenger SXT $154/mo Avg. Large Car $197/mo Monthly fuel estimates based on costs in Virginia: $2.95 /gallon. Est. Combined City/Hwy 24 MPG 19 City 30 Cost to Fill the Tank. $81. Tank Size. 18.5 gallons. *Based on 45% highway, 55% city driving, 15,000 annual miles and current fuel prices. Personalize. MSRP and tank size data provided by Edmunds.com, Inc. Range on a tank and refueling costs assume 100% of fuel in tank will be used before refueling. 2021 Dodge Challenger. Search by make for fuel efficient new and used cars and trucks 2017 Dodge Challenger 6 cyl, 3.6 L, Automatic 8-spd Regular Gasoline: View Estimates Search by make for fuel efficient new and used cars and trucks 2021 Dodge Challenger 6 cyl, 3.6 L, Automatic 8-spd Regular Gasoline: Not Available. Fuel Economy It gets good gas mileage, considering its size, whether you have a V6 or a V8 version of the Dodge Challenger. Naturally, those who drive the V6 version will have the best efficiency, but most models offer around 20 mpg and even close to 30 on the highway. A 60 second plug-n-play install is all it takes to increase the mileage of your vehicle. Performance is improved by dyno tuning your Dodge, creating a more efficient fuel map changing air/fuel mixtures, all while maintaining the vehicle warranty. The performance chip easily unplugs for emission testing and diagnostic work. 2023 Dodge Challenger SXT 2dr Coupe (3.6L 6cyl 8A) No selected vehicle. No selected vehicle. Fuel economy: Fuel economy: City/Hwy/Combined MPG: City/Hwy/Combined MPG. 19 / 30 / 23 MPG. qt2Q.