Fuel Mileage

[srt8-in-largo]

I've been running the MPG Booster tune from DS and it seems to help... but not by much... 1 mpg or so. I haven't ben able to try it on the highway though and thats where I'd expect it to make a bigger difference.

If you had a custom tuner willing to get more aggressive with it, I wouldn't be surprised if he could get 2 or 3 extra MPG's. Worth a shot.

[Popeye's Hemi]

Not real sure but I dont think the Predator (SRT cars) will give you the option for any gear less than 3.06!

Im looking at doing some mileage mods also. Love the car. But it's a very tough love. Thinking of swapping rear gear out of the 5.7 cars and tuning also. I hear the new cars come with a 2.65 gear. Good luck.

[BobF's 6POINT1]

The pure an honest reply is that most of the time, the math does not work for getting into a new car or buying a bunch of mods just for fuel savings. Take some time and calculate your expected savings vs. the amount you need to spend to get those savings. It's not uncommon to see a recoup period of 4-6 years.

Here's an example using some generous numbers:

It will cost $600 for a tune and intake to save 2mpg(max)
If you drive 10k miles per year and go from 17mpg average to 19mpg average
at $4.00 per gallon, you save about $240 for the year (if you actually get 2mpg better)

Close to 3 years to recoup. Probably more like 4.


P.S., if you put a tune, intake and exhaust on your car - are you really going to drive it gently enough to save any gas?

[kwik6]

I bought my 07 Charger SRT8 a few months ago. It had 16 k miles and was like new. I have been enjoying it as a driver and sometimes pound on it. I drive it on the expressway at 70 mph. On a really bad day it's around 17mpg, on a trip somewhere it easily runs around 20 mpg.and if I watch it a bit, I average 22 to 23, which seems really high by what I read. It is stock, but I was thinking of a CAI and InTune. D you think that would drop the mileage. I usually run Sunoco Ultra 94. Is this car just weird?

[srt8-in-largo]

I know of one or two other people who report mileage as high as yours, but I don't think that's the norm. If those are EVIC numbers try comparing to a hand calculation. Are you driving at least 300 miles per fillup?

[Silverstatticc06]

Your right foot will determine gas mileage IMO. I do mostly city driving and average 10.9 MPG I can get around 14MPG if I'm easy on it, but I didn't buy my car to drive like a grandma! I did average around 19-20MPG on long road trips tho.

[Adam Delp]

around town i get 13 or so, that a red light every 4 blocks. With the engine at operating temps (because) that makes a HUGE difference cruising at 50mph for 20 miles ive gotten 25.5mpg and the longer i cruise at that speed to more it goes up., at 65mph it will be 21mpg, at 70 its 20.5 so on and so fourth. here is one thing to remember about the evic.. and it bothers me enough to have this car crushed into a cube. and crush the engineers that designed this with the said cube... not really.. but its utter BS. if you turn the engine off., say your waiting on a friend in their driveway waiting for them to come out, or you shut it off because of an accident or a train that stopped on the tracks. or any reason that would require you to shut it off, bt not exit the car... the damn evic gauge will still tick down like your sitting at a stop light even tho the &^%$#@* engine is not running... so dont let that calculate into your MPG if you go mostly off of the evic., also another thing to point out, not sure if this engine workes this way (it should and has no reason not to) as your coasting with 0 throttle it should stop fuel completely. im not sure if is does or does not, but the evic seems to think not. if you down shift to help slow the car down with 0 throttle and just higher rpms, the EVIC counts down rather quickly... i would hope to think that the fuel shuts off... i mean my 1989 geo tracker does... so now because i have ocd and everything bothers me. when im at a drive thru thats like culvers, unlike quick mc donalds il shut the engine off... THEN open and shut the door so the evic quits counting down... its ridiculous and makes me a little crazy.

[funyfarm]

Why would anyone buy a 425hp car and expect better than 10mpg? Not to mention when a person trades it in and loses money, how long will it take to make up the difference in the loss...............not to mention having to drive the turd you trade it in for.

my thoughts exactly

[Pale Rider]

THEN open and shut the door so the evic quits counting down... its ridiculous and makes me a little crazy.

You know, I hear ya, I'm a bit OCD myself, but don't stress it ticking down when the engine's off. Think about it - it's not actually getting worse mileage for real - the engine's off. It will only bring down your REPORTED average. Others have pointed out, and many of us have verified, the EVIC is generous with it's reading by a bit. REAL calculated mileage is a bit worse than EVIC. So think of it this way, your car is becoming more accurate. Again, true mileage is NOT being harmed. I know you know that, just a friendly reminder.

[funyfarm]

just try this....1) reset the evic from a stop 2) do a couple full throttle 1/4 mile runs or so and then go along with your day driving "normally"....at least at this point you can rest assured that your mpg reading can only go up

[Tx_Charged]

Just install a procharger. i went from 19 hwy to 22 hwy. as for the city, that passing gear is kinda fun...lol

[Pale Rider]

Just install a procharger. i went from 19 hwy to 22 hwy. as for the city, that passing gear is kinda fun...lol

Not being a doubter, I trust what you're saying, but WHY would a car get better mileage with a blower added? That takes horsepower to run a blower. I'd think that 2 identical cars (except one with blower) driving down the road, the blown car would get worse mileage.

[Tx_Charged]

Don't ask me. This is all EVIC based though. I will say that driving the same stretch of road on about a 320 mile road trip, it has gone up. I now have about a 1/4 tank left as opposed to 1/8 of a tank on the same trip. So something is better and I only added the procharger.

[funyfarm]

maybe your evic wants you to go faster?

[JarZ]

I averaged 15 mpg in my SRT. Same in the R/T (modded)

Yes doing the mileage math makes you realize that it's rarely worth it to sell/trade it for more mpgs unless you project over several years. In my case, if my next car gets 20 mpg average, I'll save $1000 per year. That's not even $25 per week. So for $25 savings per week, does it makes sense to drive a 20 mpg car to save on fuel? To me, absolutely not. Skip a trip to the movies or take out food once per week and enjoy that SRT8!