For those who drive a Hemi 5.7 - Page 23 - Jeep Garage - Jeep Forum

Go Back   Jeep Garage - Jeep Forum > Jeep Platform Discussion > Grand Cherokee - WK2 -

Join Jeep Garage Today
Reply
 
Thread Tools Display Modes
 
  #265  
Old 04-09-2016, 10:42 AM
DriverDave's Avatar
Premium Member
My Jeep: 2016 5.7L WK2
 
Join Date: Dec 2015
Location: Denver, CO USA
Posts: 221
Thanks: 4
Thanked 72 Times in 47 Posts
Rep Power: 1046
DriverDave has a reputation beyond reputeDriverDave has a reputation beyond reputeDriverDave has a reputation beyond reputeDriverDave has a reputation beyond reputeDriverDave has a reputation beyond reputeDriverDave has a reputation beyond reputeDriverDave has a reputation beyond reputeDriverDave has a reputation beyond reputeDriverDave has a reputation beyond reputeDriverDave has a reputation beyond reputeDriverDave has a reputation beyond repute
Garage
I sure wish Colorado used the higher grades. We get 85, 87, and 91. I've been alternating between 87 and 91. I really wish they would drop the 85 altogether and go with the rest of the country with 87,89,91. I love Colorado as a whole, but sometimes they can be dumb.

__________________
2016 Grand Cherokee Summit V8 - "Scarlett"
"I'm not crazy, my mother had me tested"

Reply With Quote
Sponsored Links
Advertisement
 
  #266  
Old 04-09-2016, 11:00 AM
JTS97Z28's Avatar
Premium Member
My Jeep: 2015 3.6L WK2
 
Join Date: Jan 2011
Location: Plainfield, IL
Posts: 3,861
Thanks: 88
Thanked 618 Times in 455 Posts
Rep Power: 28703
JTS97Z28 has a reputation beyond reputeJTS97Z28 has a reputation beyond reputeJTS97Z28 has a reputation beyond reputeJTS97Z28 has a reputation beyond reputeJTS97Z28 has a reputation beyond reputeJTS97Z28 has a reputation beyond reputeJTS97Z28 has a reputation beyond reputeJTS97Z28 has a reputation beyond reputeJTS97Z28 has a reputation beyond reputeJTS97Z28 has a reputation beyond reputeJTS97Z28 has a reputation beyond repute
Re: For those who drive a Hemi 5.7

Quote:
Originally Posted by DriverDave View Post
and go with the rest of the country with 87,89,91. I love Colorado as a whole, but sometimes they can be dumb.
It's always been 87, 89, 93 here, but of course they advertise with up to 10% ethanol. That's been the norm now for as long as I can remember. Atleast here around Chicago.
__________________
2015 Jeep Grand Cherokee High Altitude, Bright White, V6, HK audio
Reply With Quote
The Following User Says Thank You to JTS97Z28 For This Useful Post:
  #267  
Old 04-09-2016, 11:24 AM
crombenevolant's Avatar
Premium Member
My Jeep: 2016 5.7L WK2
 
Join Date: Apr 2016
Location: Boise, ID
Posts: 225
Thanks: 11
Thanked 59 Times in 47 Posts
Rep Power: 517
crombenevolant is on a distinguished road
Re: For those who drive a Hemi 5.7

Quote:
Originally Posted by DallasGC View Post
Not sure what my Hemi got on the 1st tank from the dealer, but I got 14.17 on my first tank with 89. Now on my 2nd tank with 93, it does seem a little peppier, but now I'm getting on it more. As long as I don't get less mileage (14-15) than my Rubicon with 37's then I'm happy. I know on the highway it will probably get close to 18-19 which my Rubicon could never do. Still glad I got the Hemi.
In my ram with the hemi I have found that i consistantly get 2-3 mpg more with 91 than 87. I amguessing that the knock sensor retards the timing a little when I run 87.
Reply With Quote
  #268  
Old 04-09-2016, 11:28 AM
Member
 
Join Date: Feb 2015
Posts: 25
Thanks: 2
Thanked 4 Times in 3 Posts
Rep Power: 743
Nickbencze is on a distinguished road
Re: For those who drive a Hemi 5.7

I bought my 2011 Laredo X Hemi used in 2013 so no upfront cost for me. Coming from a Chevy Blazer zr2, the Hemi gets better mpg's than the 4.3 V6. And while it's not fast, 6.5 0-60 time for 5,000lbs is pretty quick. I applaud Jeep for putting a V8 in an suv this size which is something most automakers don't even consider, let alone 2 different size V8's.

The Hemi makes a better sound which makes for a better driving experience for me. If people stop and compliment my Jeep often they'll see the Hemi badge I put on the tailgate and say "Oh! It has a Hemi?! That's bad a**!" They wouldn't say that about the V6.

You don't always need the extra power just like you don't always need a lift kit and bigger tires. Most Jeep's are really capable offroad stock just like the V6 is plenty capable. But the V8 power is there if you need it just like the extra clearance is there if you need it.
Reply With Quote
  #269  
Old 04-09-2016, 12:46 PM
JTS97Z28's Avatar
Premium Member
My Jeep: 2015 3.6L WK2
 
Join Date: Jan 2011
Location: Plainfield, IL
Posts: 3,861
Thanks: 88
Thanked 618 Times in 455 Posts
Rep Power: 28703
JTS97Z28 has a reputation beyond reputeJTS97Z28 has a reputation beyond reputeJTS97Z28 has a reputation beyond reputeJTS97Z28 has a reputation beyond reputeJTS97Z28 has a reputation beyond reputeJTS97Z28 has a reputation beyond reputeJTS97Z28 has a reputation beyond reputeJTS97Z28 has a reputation beyond reputeJTS97Z28 has a reputation beyond reputeJTS97Z28 has a reputation beyond reputeJTS97Z28 has a reputation beyond repute
Re: For those who drive a Hemi 5.7

Quote:
Originally Posted by crombenevolant View Post
In my ram with the hemi I have found that i consistantly get 2-3 mpg more with 91 than 87. I amguessing that the knock sensor retards the timing a little when I run 87.
I did a little experiment with my 2014 Summit V8. Since it's capable of running on both 87 and 89 I wanted to see if I can notice any difference between the two and also measured fuel economy. My results were the opposite of yours. I logged the fillups using my fuely app, used the same gas station and even same gas pump for the tests with the same exact commute all the time. I don't know if it was just a coincidence or what, but the three tanks using 87 octane were the best mpg tanks logged in the ownership of my 2014 Summit. When I went back to 89 the mpg went back down slightly.
The differences were no more than 1mpg, but they seemed consistent enough that they could be valid results. All tanks using 89 were in the 16mpg range, all tanks using 87 were in the 17 range.
As far as power any differences were not really noticeable in everyday driving.
__________________
2015 Jeep Grand Cherokee High Altitude, Bright White, V6, HK audio
Reply With Quote
  #270  
Old 04-09-2016, 12:59 PM
Jim_in_PA's Avatar
Super Moderator

My Jeep: 2012 5.7L WK2
 
Join Date: Jul 2012
Location: SE PA (central Bucks County)
Posts: 4,471
Thanks: 809
Thanked 622 Times in 498 Posts
Rep Power: 96277
Jim_in_PA has a reputation beyond reputeJim_in_PA has a reputation beyond reputeJim_in_PA has a reputation beyond reputeJim_in_PA has a reputation beyond reputeJim_in_PA has a reputation beyond reputeJim_in_PA has a reputation beyond reputeJim_in_PA has a reputation beyond reputeJim_in_PA has a reputation beyond reputeJim_in_PA has a reputation beyond reputeJim_in_PA has a reputation beyond reputeJim_in_PA has a reputation beyond repute
Garage
Re: For those who drive a Hemi 5.7

I've never put in anything other than 87 in my MY12 hemi which has over 66K miles on it now...and my mileage has been just fine. I do mostly highway and some general rural driving...and have a light foot. If I was going to haul a heavy trailer over a distance, I'd likely go to 89, but I see no point in the extra expense for my normal driving pattern.
__________________
2012 GC Overland Summit - Winter Chill with New Saddle interior. 5.7L HEMI V8 - Pirelli Scorpion Verde Plus "shoes" - LED fogs and DRLs



Day-job...Telecom Technical Sales
Avocations...Woodworking, Equestrian, Food, Photography
Reply With Quote
  #271  
Old 04-09-2016, 01:11 PM
Member
My Jeep: 2015 5.7L WK2
 
Join Date: Feb 2016
Posts: 44
Thanks: 25
Thanked 6 Times in 4 Posts
Rep Power: 371
inthesticks is on a distinguished road
Re: For those who drive a Hemi 5.7

I was wondering, when and why did Jeep stop putting the Hemi badge on the JGC? Has anyone decided to add there own?
Reply With Quote
  #272  
Old 04-09-2016, 01:31 PM
Jim_in_PA's Avatar
Super Moderator

My Jeep: 2012 5.7L WK2
 
Join Date: Jul 2012
Location: SE PA (central Bucks County)
Posts: 4,471
Thanks: 809
Thanked 622 Times in 498 Posts
Rep Power: 96277
Jim_in_PA has a reputation beyond reputeJim_in_PA has a reputation beyond reputeJim_in_PA has a reputation beyond reputeJim_in_PA has a reputation beyond reputeJim_in_PA has a reputation beyond reputeJim_in_PA has a reputation beyond reputeJim_in_PA has a reputation beyond reputeJim_in_PA has a reputation beyond reputeJim_in_PA has a reputation beyond reputeJim_in_PA has a reputation beyond reputeJim_in_PA has a reputation beyond repute
Garage
Re: For those who drive a Hemi 5.7

My 2012 isn't badged, so it's before that...
__________________
2012 GC Overland Summit - Winter Chill with New Saddle interior. 5.7L HEMI V8 - Pirelli Scorpion Verde Plus "shoes" - LED fogs and DRLs



Day-job...Telecom Technical Sales
Avocations...Woodworking, Equestrian, Food, Photography
Reply With Quote
  #273  
Old 04-09-2016, 02:14 PM
Member
 
Join Date: Feb 2015
Posts: 25
Thanks: 2
Thanked 4 Times in 3 Posts
Rep Power: 743
Nickbencze is on a distinguished road
Re: For those who drive a Hemi 5.7

Only WKs' were badged. I just had one laying around from when I worked at a body shop. I think it was off a dodge charger fender. Just says "Hemi" without the 5.7
Reply With Quote
  #274  
Old 04-09-2016, 02:35 PM
nookie's Avatar
Member
 
Join Date: Feb 2014
Posts: 322
Thanks: 3
Thanked 48 Times in 35 Posts
Rep Power: 6751
nookie has a reputation beyond reputenookie has a reputation beyond reputenookie has a reputation beyond reputenookie has a reputation beyond reputenookie has a reputation beyond reputenookie has a reputation beyond reputenookie has a reputation beyond reputenookie has a reputation beyond reputenookie has a reputation beyond reputenookie has a reputation beyond reputenookie has a reputation beyond repute
Garage
For those who drive a Hemi 5.7

Aside from V8 or V6, certain features are just not available on a V6.

Plus different trans and axle offcourse

I test drove a 2015 SRT last night, presently I have diesel with GDE.

SRT did not blow me away like I thought it would/should
Brembo brakes ditto.

SRT Hemi out for me.
Reply With Quote
  #275  
Old 04-09-2016, 03:41 PM
crombenevolant's Avatar
Premium Member
My Jeep: 2016 5.7L WK2
 
Join Date: Apr 2016
Location: Boise, ID
Posts: 225
Thanks: 11
Thanked 59 Times in 47 Posts
Rep Power: 517
crombenevolant is on a distinguished road
Re: For those who drive a Hemi 5.7

Quote:
Originally Posted by JTS97Z28 View Post
I did a little experiment with my 2014 Summit V8. Since it's capable of running on both 87 and 89 I wanted to see if I can notice any difference between the two and also measured fuel economy. My results were the opposite of yours. I logged the fillups using my fuely app, used the same gas station and even same gas pump for the tests with the same exact commute all the time. I don't know if it was just a coincidence or what, but the three tanks using 87 octane were the best mpg tanks logged in the ownership of my 2014 Summit. When I went back to 89 the mpg went back down slightly.
The differences were no more than 1mpg, but they seemed consistent enough that they could be valid results. All tanks using 89 were in the 16mpg range, all tanks using 87 were in the 17 range.
As far as power any differences were not really noticeable in everyday driving.
Interesting. My Ram is a 2011 so it could be a software/tune difference? Or perhaps a geographical difference in the fuel mix (ie more ethanol in the lower grade)? I have not redone the experiment since gas went down, but last time I did I definitely saw better mileage by about 2. Maybe worth trying again to see if it still holds up.
Reply With Quote
  #276  
Old 04-09-2016, 04:12 PM
JTS97Z28's Avatar
Premium Member
My Jeep: 2015 3.6L WK2
 
Join Date: Jan 2011
Location: Plainfield, IL
Posts: 3,861
Thanks: 88
Thanked 618 Times in 455 Posts
Rep Power: 28703
JTS97Z28 has a reputation beyond reputeJTS97Z28 has a reputation beyond reputeJTS97Z28 has a reputation beyond reputeJTS97Z28 has a reputation beyond reputeJTS97Z28 has a reputation beyond reputeJTS97Z28 has a reputation beyond reputeJTS97Z28 has a reputation beyond reputeJTS97Z28 has a reputation beyond reputeJTS97Z28 has a reputation beyond reputeJTS97Z28 has a reputation beyond reputeJTS97Z28 has a reputation beyond repute
Re: For those who drive a Hemi 5.7

Quote:
Originally Posted by inthesticks View Post
I was wondering, when and why did Jeep stop putting the Hemi badge on the JGC? Has anyone decided to add there own?
Even though I know we all love big V8s, a lot of people now consider pushrod V8s old school inefficient gas guzzlers and I think I remember reading that's why they no longer advertise the "Hemi" on the vehicle. Now you can be sure they were proud to advertise the Eco diesel badge, or if there is a Hybrid in the future you know timeouts certainly say that.
__________________
2015 Jeep Grand Cherokee High Altitude, Bright White, V6, HK audio
Reply With Quote
The Following 2 Users Say Thank You to JTS97Z28 For This Useful Post:
Reply

Tags
hemi

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Let's See Those HEMI Badges ! billt Visual Modifications 31 09-11-2016 04:49 PM
Question for those who change their own oil (Hemi) 14 GC Engine Performance/Intakes/Exhausts 14 04-03-2016 11:17 PM
For those with the Hemi engine, 87 or 89 octane? NHman Grand Cherokee - WK2 - 39 09-15-2015 08:00 AM
feedback on those running an under drive pulley Awdbeast Engine Performance/Intakes and Exhausts/Superchargers/Turbos 0 04-03-2015 01:47 PM
Question for those who annoyed by Hemi tick JoeSchmoe007 Grand Cherokee - WK 1 09-19-2010 02:43 PM

Powered by vBadvanced CMPS v3.2.3

All times are GMT -5. The time now is 10:01 AM.


Powered by vBulletin® Version 3.8.8
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Copyright 2012 - JeepGarage.Org
The Jeep Grand Cherokee Owners Community

JeepGarage.org is in no way associated with or endorsed by FCA US LLC. Chrysler, Dodge, Jeep, Ram, Mopar and SRT are registered trademarks of FCA US LLC.