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 A HEMI engine with a fairly high compression of say, 10.5,, such as the 5.7 needs 93 or higher octane or it won't run optimally as I explained and will probably damage this engine with long term use of 87 or 89 octane. Anyone who wants to save money please go and put inferior low octane fuel in your muscle car. 2010 Dodge Challenger SRT8 6.1L V8 GAS Manual 6 Speed Added May 2020 • 6 Fuel-ups. Property of dlb500 . Get an accurate view of your vehicles fuel economy; In this video I discuss the Gas Mileage (MPG) on my 2019 Dodge Challenger RT 5.7L Hemi. So how bad is it? Watch the video entirely and I'll show you how to b Tailpipe Emissions. 7.1 tons CO 2. Challenger SE. vs. 6.5 tons. Avg. Large Car. Yearly estimate based on your driving miles. Learn more about 2010 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 measurement Lambda is the actual air fuel ratio over the stoichiometric ratio. A Lambda measurement of “1” equates to the air fuel ratio of 14.7 (for gasoline engines). When Lambda is less than 1 the engine runs “rich”, i.e., unburned fuel exists in the exhaust stream. If lambda is greater than 1 the engine runs lean, i.e., free 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. iUSxF.