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Any ideas what fuel economy will be for this pig?

13K views 74 replies 27 participants last post by  jeep2011 
#1 ·
I know specific details have yet to be released about the new SRT8, but based on figures for the other SRT vehicles that have been released with the new motor, does anyone think there is going to be any real improvement in fuel economy for the new Jeep SRT8? I understand its heavier than the previous model and obviously has more HP. I sold my 2008 SRT8 last year because I just got soo sick of filling up every other day it was ridiculous. I was kind of hoping that the new one might see some improvements, but since Jeep did absolutely nothing to significantly improve the WK2 hemi economy I would imagine the new SRT8 will be just as bad or maybe even worse than the previous generation SRT. I so wish it were better because I truely want a fun daily driven WK2 SRT8, but being realistic as a daily driver its a joke. I would be better off keeping my current daily driver sedan and get myself back into another 505hp C6 Z06 vette than can do 22 city and 30mpg hwy.
I know no one would buy a SRT8 or even let alone a regular Grand Cherokee for fuel economy, but unless your filthy rich I would imagine getting 8mpg on a daily driver would kind of piss you off to lol (Ok I exaggerated I used to get 12 in my 08 SRT).

So what are your thoughts on this? Worse, similar, or better MPG for the new WK2 SRT8?
 
#3 ·
I suspect this will be a concern for most everyone...... Rumor has it gas will be over $4/gallon soon and it will continue to climb.

I really don't feel like paying a gas guzzler tax and then having it be so thirsty that I don't want to drive it.
 
#7 · (Edited)
It's not a matter of being able to afford it because if your buying a 50K suv I would assume you can. It's a matter of being so poor on gas that it's basically annoying especially if it's going to be daily driven. User Marlin above made a good point that atleast it has a larger gas tank to maybe take a little pain away of having to fill it up every 3 days like on the WK SRT.
If possibly the new one is similar or slightly better than the previous generation that along with the larger fuel tank might not be so bad.

James
 
#10 ·
Dont feed the troll James! LOL

As far as fuel economy goes with the next gen SRT, I say that it will most likely be the same. The damn thing is 500 lbs heavier. :(

And for fuel economy in my SRT, I daily drive it in NYC, I live in Downtown Manhattan, I get 7 mpgs. Fill up about 3 times a week.

If I really push it, 6 mpg is attainable with a very very heavy foot.

But none of that really matters, the Jeep puts a smile on my face everyday and that's what counts. :)
 
#11 ·
Dont feed the troll James! LOL

As far as fuel economy goes with the next gen SRT, I say that it will most likely be the same. The damn thing is 500 lbs heavier. :(

And for fuel economy in my SRT, I daily drive it in NYC, I live in Downtown Manhattan, I get 7 mpgs. Fill up about 3 times a week.

If I really push it, 6 mpg is attainable with a very very heavy foot.

But none of that really matters, the Jeep puts a smile on my face everyday and that's what counts. :)


Yeah the new one sure is a tank thats for sure. I will say this my 08 SRT sure did put smiles on my face that thing was a blast. As fun as it is though 6 to 7mpgs and filling up 3 times a week will take a very dedicated enthusiast to do that. You certainly love your SRT8:thumbsup:
Atleast for me I live in the far suburbs of Chicago and for the most part my commute to and from work is wide open plus I work weird shifts for my job so traffic is never an issue. This helps a lot! Well I guess we will find out soon enough what the new SRT is all about but I do agree with you. I think the 4cyl mode and any other improvements will just be overcoming the added weight of the new one. Either way though its gonna be bad ass!! :D
 
#13 ·
Here is a few quotes from wk2jeeps.com:

"Building upon the standard Fuel Saver technology (four-cylinder mode) found in the new 6.4 HEMI V-8, a new for 2012 active valve exhaust system allows the technology to engage over a wider rpm range, which delivers improved fuel efficiency or the use of all eight cylinders when the power is needed. An active intake manifold and high-lift camshaft with cam phasing provides maximum low-end torque for impressive standing starts while optimizing high-end power"

"6.4L HEMI with MDS 465-470 HP (est.) "
 
#16 ·
I see this thing has MDS - when this "feature" first came out it was horrible...did they ever get this resolved. The surging on the 5.7?

I was relieved when the 6.1 came out without MDS - hoping the 6.4 is smooth and not noticeable....that would be ashame.
 
#27 ·
I see this thing has MDS - when this "feature" first came out it was horrible...did they ever get this resolved. The surging on the 5.7?
I have an '05 R/T with a Hemi and MDS. I am very active in the LX Forums. I cant ever remember anyone complaining about surging. The transition is seamless. The only time most people notice is what they have a fairly loud aftermarket exhaust system. They can hear it drop to 4 cylinders. I have a Borla 112 and have never heard it in 90K miles.
Where did you hear this?
 
#18 ·
Yeah I didnt have any surging on my older 5.7 Hemi with MDS. Maybe he was talking about the issue some are having right now with their WK2 Hemi. I think thats isolated to cars built in a certain time frame. Should be fixed by now anyway.

James
 
#25 ·
I just traded in my 2010 SRT8 because of the mpg... I expected it to be bad 12mpg city and 16mpg hwy, but I was hoping that was something that hwy driving would be slightly better as 90% of my driving is such. Owned it for 1 yr almost to the day and but 21,104 miles on her. Total gas bill is over $4,300 for said miles. I only saw 16mpg 3x during the year and ONCE in New Jersey I saw 17mpg. My gas is taxed back to me since my job requires me to be on the road all the time but it was annoying to have to fill the tank every 200-250 miles. I drove from CT to TX (2500 miles) and the total bill was over $700. Until we get an 8spd trans (hopefully), I will wait for the 2013/2014 SRT8. The Cayennes are now all over 20+mpg including the turbos.... But for now, I am loving my 2011 GC Limited w/ 5.7 and 2wd....
Nik
 
#26 ·
Well.... I currently have a 4.7 WJ. In town I get 12mpg. On the highway at 75mph I get 18mpg. I highly doubt the new SRT8 will get worse mileage than that. But as you mentioned there are other options to do get better mileage.

I wonder what the future will bring for mileage and resale values of gas drinking hogs.
 
#28 ·
Inlaws had the 5.7 Wk - it was awful with the surging at highway speeds - you could hear it and feel it.

I was so relieved to here the 6.1 didnt have it - I would not have purchased.
 
#29 · (Edited)
Mine Surges at at specific speeds between 110 and 120, if it does it, I just increase or decrease my speed a little bit and it's fine. I can only hear it (barely) because of an ongoing exhaust issue I have

The 2012 srt8 GC will get something like 16-17 highway (max) and 6-8 city.
 
#32 ·
Funny Milous...

I too am in the "concerned" category about the fuel economy of the new Grand Cherokee SRT8. I've decided to wait until the 2013 model to see if they drop the 8-speed in it. I'd be kicking myself everyday if I bought the 5-speed version the first model year and then the rest of the years of the 2nd gen SRT8 had the 8-speed. You know the deal with the low MPG's going into the purchase, but if I can get the same performance with even slightly better gas mileage a year later, I'll save my money up and be ready to roll next year. Let's face it; these rigs have such poor fuel economy that even a 1-2 MPG improvement yields some pretty significant savings that can be used for other things (upgrades, etc.).
 
#39 · (Edited)
No disrespect, but I'm so sick and tired of the "if you are worried about gas mileage than this isn't the automobile for you" statements. If that's truly the mindset for most people out there, then I guess it could also be said that "if you're only concerned about speed, then this isn't the automobile for you". YES, this is a performance automobile, but it's also got a big back seat and sizable cargo area (not to mention towing ability) that adds a lot of size and weight. Many of us want the Grand Cherokee SRT8 because it's a performance automobile AND a "do it all" daily driver, which is why MPG's come into the equation for many of us. I think just about all of us are ready for poor gas mileage in exchange for performance, but give pause at insanely terrible gas mileage while gas prices are heading for the $5.00 per gallon mark.
 
#40 · (Edited)
No disrespect, but I'm so sick and tired of the "if you are worried about gas mileage than this isn't the automobile for you" statements. If that's truly the mindset for most people out there, then I guess it could also be said that "if you're only concerned about speed, then this isn't the automobile for you". YES, this is a performance automobile, but it's also got a big back seat and sizable cargo area (not to mention towing ability) that adds a lot of size and weight. Many of us want the Grand Cherokee SRT8 because it's a performance automobile AND a "do it all" daily driver, which is why MPG's come into the equation for many of us. I think just about all of us are ready for poor gas mileage in exchange for performance, but give pause at insanely terrible gas mileage while gas prices are heading for the $5.00 per gallon mark.
Agreed 100%
If the srt-8 really did get 5 mpg city which im sure that the above image is just a joke, then it would render it useless as any sort of a daily driver unless you enjoy having your car cost as much as a taxi cab to drive around in.
 
#42 · (Edited)
The previous model Challenger SRT8 with the 6.1L and 5 speed automatic was rated at 13 city / 19 highway (15 combined) MPG while the previous model Grand Cherokee SRT8 with the 6.1L and the 5 speed automatic was rated as good as 12 city / 16 highway (13 combined) MPG in 2010.

The NEW Challenger SRT8 with the 6.4L and 5 speed automatic is rated at 14 city / 22 highway (16 combined) MPG so I'm GUESSING that the 2nd generation Grand Cherokee SRT8 with the 6.4L and the 5 speed automatic will be around 12 city / 18 highway (14 combined) MPG thanks to the new cylinder deactivation from the new engine despite the additional overall weight / power.

It should be even better if they drop that 8 speed automatic in it next year... (which is what I'm waiting / hoping for)

See previous fuel economy ratings HERE
 
#43 ·
Ok lets be honest here. Its a performance SUV, and once you get it you will be driving it a little harder than you would your regular vehicle. And even if you drive it somewhat normal, lol, you wont get that good of mileage anyways.


MPG really shouldnt be a worry when buying this vehicle.


Just my 2 cents.
 
#44 · (Edited)
MPG really shouldnt be a worry when buying this vehicle.
Poor MPG's literally means watching more cash vaporize. If money isn't a concern, then the sticker price of a new Grand Cherokee SRT8 with poor MPG's aren't a concern. If money IS a concern (and it is for most of us), then the purchase of a new Grand Cherokee SRT8 with poor MPG's IS a concern. "Unfortunately", the lower sticker price when compared to other comparable performance SUV's puts the Grand Cherokee SRT8's sticker price in the "I think I can swing that but the MPG's might kill me" category for many people. It really comes down to what an individual is comfortable with when he / she weighs all of the pros or cons.
 
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