Join Date: Aug 2018
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I have a 2013 Dodge Challenger RT Classic 6 speed with the 3.92 rear, city currently in Fort Rucker, Daleville, and Enterprise is 21.6. Back home Ogden Kansas, Manhattan, Junction City and Fort Rile was 22.1 - 24.7 and peaked at 25 when babying it. But of course, back home driving city to city is a nice distance drive, though I kept to the scenic routes, stayed off the highways and K-18 and chose my routes and time of day driving to avoided traffic. The worst I've seen it was 14 in the city and that was because I was a student at the university and this car really dislikes being in the city and traffic, however as soon as I got some good distance driving within in the city and was able to traverse to other towns and city (again avoiding the highway or K-18) it picked right back up in a day. This car loves and wants to be driven, the catch is, it wants to be driven not in traffic, it's sort of a lone wolf but if it has to be around a pack (or other cars like traffic) you want to be ahead of the pack.
Now for highway, I traveled about 1000 miles quite a few times now, from Ogden Kansas to Fort Rucker, then Rucker to Kansas, then Kansas to Texas, Texas to Kansas, Kansas to Rucker, Rucker to Kansas and finally Kansas to Rucker... All non-stop trips (Really only stopping for fuel and snacks). This car handles these long trips amazingly, very comfortable, 13-15 hr trips about 1000 miles one way except the Texas trip that was a 6 hr trip there then add a 6 hr back. At 75-80 mph the car gets 27-30 mpg provided there are no hills, however, there are hills so it stays consistent at 27.6 wanting to go up (considering the trip from Kansas to Rucker has 3 routes to choose from). The city driving I usually shift at 1500 rpm to 2500, if there's a hill 2000 rpm, the car handles this just fine. Highway driving doesn't matter on rpm cause I traffic is usually in a haul ass mode so I try not to be an obstruction but I try not to go above 5000 rpm when initially exiting the ramp then the shifts obviously drops to like 2500 - 3500 rpm per shift till 6th which I think settles just under 2000 at 75-80 mph (I think, can't remember, having a brain fart).
Now I have put some mods/bolt-ons on my vehicle which do aid the performance of the vehicle which does also help fuel economy as well. What I have noticed from before I modded my vehicle to where it is now, the 27-30 was achievable and more consistent due to the mods whereas before it would barely get to 27 and hold there for Highway. City wise, roughly same numbers, however, this baby is more willing and able to reach the upper numbers faster than before at stock.
The 5.7 hemi is an amazing engine... Wish at stock it would've had more horsepower and torque than what was given (especially as a competitor to the Mustang GT and the SS Camaro which are lighter vehicles with their respective 5.0 and 6.2 engines power settings). A positive to the engine in this regard is that the engine has been out for a while and thus there are plenty of mods to add to make up for this. A possible theory crafting thought is to wonder what if the current challenger weighed as much as the 1970 challenger, then imagine how much fuel economy would be, imagine the feel of power too.
I actually still have more mods to put in this vehicle, looking at getting some Edelbrock cylinder heads, wonder how much better my fuel economy will get then, or better yet, my final big mod the 400 or 410 Stroker kit. Obviously a bigger displacement will require more fuel so you could say it will drop... however with a 6 speed manual and since I don't intend using the vehicle for racing (pure daily driving but with the option to put the pedal to the metal, much like the trim implies * R/T = Road/Track, roadable being streetable and trackable being raceable*). I believe with my driving I can prove such an engine modded this way can be a great daily driver and save fuel and be fun too.