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

Join Jeep Garage Today
Reply
 
Thread Tools Display Modes
 
  #25  
Old 02-21-2014, 11:11 AM
bill_de's Avatar
Premium Member
My Jeep: 2014 5.7L WK2
 
Join Date: Sep 2012
Posts: 6,005
Thanks: 307
Thanked 317 Times in 279 Posts
Rep Power: 1801461
bill_de has a reputation beyond reputebill_de has a reputation beyond reputebill_de has a reputation beyond reputebill_de has a reputation beyond reputebill_de has a reputation beyond reputebill_de has a reputation beyond reputebill_de has a reputation beyond reputebill_de has a reputation beyond reputebill_de has a reputation beyond reputebill_de has a reputation beyond reputebill_de has a reputation beyond repute
Re: Looking for a Jeep...confused

Quote:
Originally Posted by Unobtanium View Post

Is 87 a problem or does it limit anything?
89 is the optimal octane for the compression ratio, default timing, and whatever else the computer adjusts for. If you use 87 typically the timing would have to be retarded. The Jeep will do this automatically. You could loose a little pep racing from a stop sign and may get lower MPG. Depending on your driving habits it might not be enough that you would notice.

It will not hurt the engine.

On pre-computer controlled engines you would get a lot of pinging. The pinging indicates a problem that over time could cause damage. So love em or hate em, sometimes computers do good.


---
__________________

__________________
If you need a shoulder to cry on ...

... pull over to the side of the road!

Reply With Quote
  #26  
Old 02-21-2014, 11:34 AM
Member
 
Join Date: Feb 2014
Posts: 176
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 8358
Unobtanium has a reputation beyond reputeUnobtanium has a reputation beyond reputeUnobtanium has a reputation beyond reputeUnobtanium has a reputation beyond reputeUnobtanium has a reputation beyond reputeUnobtanium has a reputation beyond reputeUnobtanium has a reputation beyond reputeUnobtanium has a reputation beyond reputeUnobtanium has a reputation beyond reputeUnobtanium has a reputation beyond reputeUnobtanium has a reputation beyond repute
Re: Looking for a Jeep...confused

Quote:
Originally Posted by bill_de View Post
89 is the optimal octane for the compression ratio, default timing, and whatever else the computer adjusts for. If you use 87 typically the timing would have to be retarded. The Jeep will do this automatically. You could loose a little pep racing from a stop sign and may get lower MPG. Depending on your driving habits it might not be enough that you would notice.

It will not hurt the engine.

On pre-computer controlled engines you would get a lot of pinging. The pinging indicates a problem that over time could cause damage. So love em or hate em, sometimes computers do good.


---
Good deal. I ask because the dealership told my my Z06 would throw a bunch of codes if I tried that and possibly need an ECU reset or some such because of how the fuel/timing tables would respond. Good to know that this is fine!


*As a side note, Ford lists the Mustang 5.0 as losing about 8-15bhp, IIRC, using low grade fuel, the ECU is fine with it, and re-maps the fuel/timing tables for it. So the loss should not be much for the JGC.

Most of my complaint is all the damn Ethanol. Where I'm moving, there is an E Free gas station! (In a town of 500 people...yay!)
__________________

__________________
Reply With Quote
  #27  
Old 02-21-2014, 11:45 AM
bill_de's Avatar
Premium Member
My Jeep: 2014 5.7L WK2
 
Join Date: Sep 2012
Posts: 6,005
Thanks: 307
Thanked 317 Times in 279 Posts
Rep Power: 1801461
bill_de has a reputation beyond reputebill_de has a reputation beyond reputebill_de has a reputation beyond reputebill_de has a reputation beyond reputebill_de has a reputation beyond reputebill_de has a reputation beyond reputebill_de has a reputation beyond reputebill_de has a reputation beyond reputebill_de has a reputation beyond reputebill_de has a reputation beyond reputebill_de has a reputation beyond repute
Re: Looking for a Jeep...confused

Quote:
Originally Posted by Unobtanium View Post
Where I'm moving, there is an E Free gas station! (In a town of 500 people...yay!)
Can we work something out where you ship me 20 gallons a month?

If 87 would be harmful to the engine the owners manual would only list 89. I use the 89 because it seems like such a bargain compared to the 93 I had to put in my MDX. Everything is relative.
__________________
If you need a shoulder to cry on ...

... pull over to the side of the road!

Reply With Quote
  #28  
Old 02-21-2014, 12:16 PM
Member
 
Join Date: Feb 2014
Posts: 176
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 8358
Unobtanium has a reputation beyond reputeUnobtanium has a reputation beyond reputeUnobtanium has a reputation beyond reputeUnobtanium has a reputation beyond reputeUnobtanium has a reputation beyond reputeUnobtanium has a reputation beyond reputeUnobtanium has a reputation beyond reputeUnobtanium has a reputation beyond reputeUnobtanium has a reputation beyond reputeUnobtanium has a reputation beyond reputeUnobtanium has a reputation beyond repute
Re: Looking for a Jeep...confused

Quote:
Originally Posted by bill_de View Post
Can we work something out where you ship me 20 gallons a month?

If 87 would be harmful to the engine the owners manual would only list 89. I use the 89 because it seems like such a bargain compared to the 93 I had to put in my MDX. Everything is relative.
Agreed. I haven't owned a vehicle that ran 89 in years! I'm loving it!
__________________
Reply With Quote
  #29  
Old 02-21-2014, 12:17 PM
traba1993's Avatar
Member
My Jeep: 2005 5.7L WK
 
Join Date: Dec 2013
Location: crowded cali
Posts: 265
Thanks: 0
Thanked 3 Times in 3 Posts
Rep Power: 505
traba1993 is on a distinguished road
Quote:
Originally Posted by dr.lee.baugh View Post
I wouldn't worry too much about the skid plates. If you are seriously going to off-road they need upgrading, if you are not, you are fine without them. My guess is the front was removed for an oil change at some point and never reinstalled. No biggie. As for the trail rated badge, that also could have been removed. Some people don't like the asymmetry as it is only on the driver side. They are also prone to wear. Who knows, some punk kid's girlfriend could now have a trail rated necklace!
Hey hey hey. Take it easy on us punk kids. I hated the fact I had a trail rated badge on one side and not the other so I pulled it off and actually yes I made my girlfriend I necklace out of it. Hahaha
__________________
Reply With Quote
  #30  
Old 02-21-2014, 12:18 PM
traba1993's Avatar
Member
My Jeep: 2005 5.7L WK
 
Join Date: Dec 2013
Location: crowded cali
Posts: 265
Thanks: 0
Thanked 3 Times in 3 Posts
Rep Power: 505
traba1993 is on a distinguished road
Quote:
Originally Posted by Unobtanium View Post
Well, dealer was wrong. Vehicle has all the skid plates. Trans fluid is clear pink with zero smell. A drive around town romping a bit netted 12.8-13.6 avg. Mpg. Normal?
That's about what I see on a daily basis. Except if I'm in a mood. It quickly drops to 9.9-10.9.
__________________
Reply With Quote
  #31  
Old 02-21-2014, 06:33 PM
Strongjeff's Avatar
Project Six Shooter
My Jeep: 2008 3.7L WK
 
Join Date: Sep 2012
Location: Songwon, South Korea
Posts: 4,624
Thanks: 104
Thanked 180 Times in 173 Posts
Rep Power: 11248
Strongjeff has a reputation beyond reputeStrongjeff has a reputation beyond reputeStrongjeff has a reputation beyond reputeStrongjeff has a reputation beyond reputeStrongjeff has a reputation beyond reputeStrongjeff has a reputation beyond reputeStrongjeff has a reputation beyond reputeStrongjeff has a reputation beyond reputeStrongjeff has a reputation beyond reputeStrongjeff has a reputation beyond reputeStrongjeff has a reputation beyond repute
Garage
Re: Looking for a Jeep...confused

Quote:
Originally Posted by Unobtanium View Post
Yes, it has front tow hooks, although they don't show up the best here:



Yeah, the mileage is...painful. But off-set by being able to use 87 and 89 octane. The dealer filled it up with 87 because the pump for 89 wasn't working (station had no gas, I was the one who filled it, so I know this for fact). Is 87 a problem or does it limit anything?

This vehicle seems to be of much higher quality than my 370Z, except the NAV. The NAV unit is pure stone-age, but it is very functional and attached to a good sound system, so it's a little nit-pick that I really don't feel much irritation over.

I now need tires. These are about done. What tires should I get? I have NEVER bought tires for anything but a sports car.

I value (for this application)

-hydroplane resistance
-quiet
-clean/clear asphalt handling/traction
-off-road traction/handling
-longevity
-price

In that order.
Good year silent armors are good and will fill all but maybe the price. my dad paid 850 for a set on there 03 Durango. still have em on and are at least 75% tread. they were installed late 07
__________________
2008 JGC, Grey Stone Metallic SRT-6
MODS-http://www.jeepgarage.org/f5/project-six-shooter-build-thread-68955.html
Reply With Quote
  #32  
Old 02-21-2014, 06:48 PM
Member
 
Join Date: Feb 2014
Posts: 176
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 8358
Unobtanium has a reputation beyond reputeUnobtanium has a reputation beyond reputeUnobtanium has a reputation beyond reputeUnobtanium has a reputation beyond reputeUnobtanium has a reputation beyond reputeUnobtanium has a reputation beyond reputeUnobtanium has a reputation beyond reputeUnobtanium has a reputation beyond reputeUnobtanium has a reputation beyond reputeUnobtanium has a reputation beyond reputeUnobtanium has a reputation beyond repute
Re: Looking for a Jeep...confused

Quote:
Originally Posted by Strongjeff View Post
Good year silent armors are good and will fill all but maybe the price. my dad paid 850 for a set on there 03 Durango. still have em on and are at least 75% tread. they were installed late 07
Ii just included price (at the bottom) because I am not going to pay $300/tire for some "this was used in the Baja 1000..." 2% improvement mess is all.

Sadly, while the specs look very nice, I don't see them in my size. I have need of 245/60/18s.
__________________
Reply With Quote
  #33  
Old 02-22-2014, 10:48 AM
Member
 
Join Date: Feb 2014
Posts: 176
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 8358
Unobtanium has a reputation beyond reputeUnobtanium has a reputation beyond reputeUnobtanium has a reputation beyond reputeUnobtanium has a reputation beyond reputeUnobtanium has a reputation beyond reputeUnobtanium has a reputation beyond reputeUnobtanium has a reputation beyond reputeUnobtanium has a reputation beyond reputeUnobtanium has a reputation beyond reputeUnobtanium has a reputation beyond reputeUnobtanium has a reputation beyond repute
Re: Looking for a Jeep...confused

What about these? Would they do what I want and still allow me to deal with the soft shoulder of a normal road after a hard rain or a gravel/rock creek-bed like what I would cross in Northwest Arkansas?
http://www.tirerack.com/tires/tires....lus+Technology
__________________

__________________
Reply With Quote
Reply

Tags
jeep

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
A little confused... jeepntx Wrangler-YJ, TJ & JK 2 10-26-2011 12:51 PM
Confused...again BuckeyeSRT Grand Cherokee - WK2 - 11 03-31-2011 12:13 PM
I am confused mrfixxit7 Grand Cherokee - WK2 - 7 11-06-2010 11:29 AM
Confused Again! Sid Fields Grand Cherokee - WK2 - 12 09-24-2010 02:02 PM

Powered by vBadvanced CMPS v3.2.3

All times are GMT -5. The time now is 01:16 AM.


Powered by vBulletin® Version 3.8.8 Beta 4
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
Copyright 2012 - JeepGarage.Org
The Jeep Grand Cherokee Owners Community