Fuel Economy of 2009 Dodge Vehicles. EPA MPG Owner MPG Estimates 2009 2009 Dodge Challenger 8 cyl, 6.1 L, Automatic 5-spd Regular Gasoline:
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.
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.
Availability Standard — Dodge Challenger SXT and SXT Plus Type and Description 60-degree V-type, liquid-cooled Displacement 3,604 cu. cm (220 cu. in.) Bore x Stroke 96.0 x 83.0 mm (3.78 x 3.27) Valve System Chain-driven DOHC, 24 valves, hydraulic end-pivot roller rockers Fuel Injection Sequential, multiport, electronic, returnless
Phantom372 said: From the owner's manual: "The 3.6L and 5.7L engine (with automatic transmission) is 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." 5.7L Hemi Main and Rod Bearing Wear. View Gallery. 23 Photos. Once again, we were happy to see virtually no wear on any of the rod or main journal bearings on the 235,000-mile 5.7L Hemi. Again Fuel Economy of the 2017 Dodge Challenger. Compare the gas mileage and greenhouse gas emissions of the 2017 Dodge Challenger side-by-side with other cars and trucks Benefits of a cold air intake upgrade for the 345 HEMI include: 5-15+whp. 5-15+wtq. Better fuel economy. Improved throttle response. Louder engine/induction sounds. 5.7 HEMI cold air intake horsepower gains can vary widely. On a bone stock 5.7L V8 it’s unlikely you’ll pick up much more than roughly 3-7whp. Engine. 5.7L V8 Gas. Horsepower. 375 hp @ 5150 rpm. Torque. 410 lb-ft @ 4300 rpm. Transmission. 6-Speed Manual. 8-Speed Automatic (+$1,400) GregCon said: First.when I refer to MPG I am talking about MPG that is derived by filling up the tank, driving, the refilling the tank - not the vehicle's computer. That said, the car (2015 SRT M6) gets 15-17 in mixed driving. On a pure highway trip, the best I have been able to get is 21.2MPG.10HORT. 1675 posts · Joined 2010. #11 · Jul 16, 2019. I've had both and the oil changes are less frequent on the 6.4, but more expensive, my gas mileage went from (Driving the way I want to, not like I should for max economy) 15.5-16 in my R/T to about 14.0 in my Scatpack.