2015 Grand Cherokee - V-8 Or V-6 ?? - Page 20 - 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
 
  #229  
Old 04-02-2015, 01:21 AM
BobsWK2's Avatar
Senior Member
 
Join Date: Aug 2010
Posts: 1,903
Thanks: 6
Thanked 71 Times in 61 Posts
Rep Power: 50807
BobsWK2 has a reputation beyond reputeBobsWK2 has a reputation beyond reputeBobsWK2 has a reputation beyond reputeBobsWK2 has a reputation beyond reputeBobsWK2 has a reputation beyond reputeBobsWK2 has a reputation beyond reputeBobsWK2 has a reputation beyond reputeBobsWK2 has a reputation beyond reputeBobsWK2 has a reputation beyond reputeBobsWK2 has a reputation beyond reputeBobsWK2 has a reputation beyond repute
Re: 2015 Grand Cherokee - V-8 Or V-6 ??

Quote:
Originally Posted by silvermax04 View Post
my varying opinion on that is if you are just running around the suburbs in an average climate then 87 is just fine. if you are towing 7200 lbs up a mountain in death valley definitely use the 89.
But usually only a 20 cent difference between them so just using the 89 is not much of an expense anyway
87 to 89 octane around here is normally a 10 cent difference. So with the hemi, that's peanuts.

__________________
2014 Summit 4X4, V8
Reply With Quote
Sponsored Links
Advertisement
 
  #230  
Old 04-02-2015, 06:22 AM
Hutch801's Avatar
Member
My Jeep: 2014 3.0L WK2
 
Join Date: Aug 2014
Location: Brisbane, QLD
Posts: 825
Thanks: 120
Thanked 139 Times in 115 Posts
Rep Power: 17380
Hutch801 has a reputation beyond reputeHutch801 has a reputation beyond reputeHutch801 has a reputation beyond reputeHutch801 has a reputation beyond reputeHutch801 has a reputation beyond reputeHutch801 has a reputation beyond reputeHutch801 has a reputation beyond reputeHutch801 has a reputation beyond reputeHutch801 has a reputation beyond reputeHutch801 has a reputation beyond reputeHutch801 has a reputation beyond repute
Garage
Re: 2015 Grand Cherokee - V-8 Or V-6 ??

Quote:
Originally Posted by billt View Post
For me at my age, it's just too much of a hassle. If the diesel didn't have a DEF system, and utilized a cheap, easy to replace, spin on oil filter, and didn't require such expensive, hard to get oil, I might consider it. As you say it's both powerful and economical. But the HEMI is very well proven, and you don't have to mess with all the rest.

I see, we don't have half that crap with our diesel. No def.


Hutch- 2014 GC Blackhawk CRD...Feel the Power...
__________________
Hutch: 2014 Grand Cherokee Blackhawk in Black of Course.....CRD Feel the Power..
Reply With Quote
  #231  
Old 04-02-2015, 07:39 AM
Goohead's Avatar
Member
 
Join Date: Feb 2015
Posts: 56
Thanks: 0
Thanked 1 Time in 1 Post
Rep Power: 752
Goohead is on a distinguished road
Re: 2015 Grand Cherokee - V-8 Or V-6 ??

Using a lower than recommended octane rating will just retard timing.

87 tend to leave more carbon deposits because it does not burn as clean. Chevron techron is a good fuel cleaner, just run that ever 5k and you should be good.

Diesels generally do last longer than gas. Part of it is due to the Low red line. Example my EcoDiesel redlined at ~ 4.5k compared to gas counterpart.

From rebuilding gas engines, higher rpm=more wear, again this might not matter if you don't keep your vehicle for a long time, thus your extra wear would still be " in spec" at tie of rebuild
Reply With Quote
  #232  
Old 04-02-2015, 08:06 AM
bill_de's Avatar
Premium Member
My Jeep: 2017 5.7L WK2
 
Join Date: Sep 2012
Posts: 8,425
Thanks: 703
Thanked 982 Times in 776 Posts
Rep Power: 1805135
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: 2015 Grand Cherokee - V-8 Or V-6 ??

Quote:
Originally Posted by BirchyBoy View Post
I wish the manual said mid-grade instead of 91. In Denver, the octane ratings are two points lower, so mid-grade is 89 and premium is 91. Since I told my wife what the manual says 91, she won't believe me about the different ratings. According to her, I'm going to damage the engine by putting 89 in it
I was surprised that you said the manual states 91. I know that for the '14s it stated 89 for the Hemi. So being curious I down loaded the '15 manual from Jeep.com. At first I thought I pressed the wrong button because I got the SRT manual. I tried again and found that whether I clicked on "Grand Cherokee" or "SRT" I was getting the SRT manual, which indeed calls for 91. But, that is referring to the 6.4 engine.

My guess is (maybe wrong) that 89 is still the recommended fuel for the 5.7 as there were no major changes to that engine recently. Double check that the manual you are reading specifies 5.7.


---
__________________
If you need a shoulder to cry on ...
... pull over to the side of the road!

Reply With Quote
  #233  
Old 04-02-2015, 08:27 AM
billt's Avatar
Senior Member
My Jeep: 2015 5.7L WK2
 
Join Date: Mar 2015
Location: Glendale, Arizona
Posts: 1,335
Thanks: 313
Thanked 232 Times in 170 Posts
Rep Power: 2013
billt is on a distinguished road
Re: 2015 Grand Cherokee - V-8 Or V-6 ??

Quote:
Originally Posted by Hutch801 View Post
I see, we don't have half that crap with our diesel. No def....... Hutch
You guys are lucky. The Eco Diesel in the American Grand Cherokee is the result of what happens when the EPA gets involved with auto production to the point of, "making the cure worse than the disease", so to speak.

As I mentioned back in 1979 I had a Volkswagen Rabbit Diesel. It was extremely simple to maintain, and the most reliable car I've ever owned. No DEF, or other emission nonsense. It had a nice full size, spin on oil filter that was located right in front under the hood. Just bend over and unscrew it, and screw a new one on. It took most ANY "SF" rated motor oil, and just 4 quarts of it. I put a Fumoto petcock on the drain plug, and an oil change took 10 minutes tops. Half of which was waiting for the oil to drain.

The fuel filter / water separator was also a simple spin on unit that was attached to the firewall. Super easy to get to and replace or drain. In over 120,000 miles all I ever did to it was replace the glow plugs and the timing belt....... Once. Which they did while I waited at the dealer. I bought oil filters for around $4.50 each. The car delivered an honest 50 MPG. I remember I had an extra after market 10 gallon Polyethylene tank installed. I drove from Chicago to Houston, Texas to visit my dad back in 1980 non stop. When I filled up it was less than $14.00. If I remember Diesel was around .65 or .70 cents a gallon back then.

Now, with this new Grand Cherokee Eco Diesel the same simple service has become a expensive, time consuming nightmare. If they hadn't screwed everything up with all of the overpriced, complicated servicing and "improvements", I'd buy one in a heartbeat. But like so many good things in life, they managed to ruin it by trying to make it "better".
Reply With Quote
  #234  
Old 04-02-2015, 08:32 AM
silvermax04's Avatar
Premium Member
My Jeep: 2014 5.7L WK2
 
Join Date: Feb 2013
Posts: 3,394
Thanks: 259
Thanked 569 Times in 440 Posts
Rep Power: 30368
silvermax04 has a reputation beyond reputesilvermax04 has a reputation beyond reputesilvermax04 has a reputation beyond reputesilvermax04 has a reputation beyond reputesilvermax04 has a reputation beyond reputesilvermax04 has a reputation beyond reputesilvermax04 has a reputation beyond reputesilvermax04 has a reputation beyond reputesilvermax04 has a reputation beyond reputesilvermax04 has a reputation beyond reputesilvermax04 has a reputation beyond repute
Quote:
Originally Posted by bill_de View Post

I was surprised that you said the manual states 91. I know that for the '14s it stated 89 for the Hemi. So being curious I down loaded the '15 manual from Jeep.com. At first I thought I pressed the wrong button because I got the SRT manual. I tried again and found that whether I clicked on "Grand Cherokee" or "SRT" I was getting the SRT manual, which indeed calls for 91. But, that is referring to the 6.4 engine.

My guess is (maybe wrong) that 89 is still the recommended fuel for the 5.7 as there were no major changes to that engine recently. Double check that the manual you are reading specifies 5.7.

---
V6 is 87
V8 5.7 is 89 with 87 acceptable
V8 SRT is 91
Reply With Quote
Reply

Tags
2015, grand cherokee

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
Wrangler 2015 or Cherokee 2015? johnbacon911 Wrangler-YJ, TJ & JK 14 01-21-2015 08:27 PM
2015 Cherokee Trailhawk :: 2015 Jeep Cherokee Trailhawk Miela Member Garage Discussions 1 12-28-2014 06:14 PM
2015 Jeep Grand Cherokee Trail Warrior Concept Photos JonniMR Grand Cherokee - WK2 - 26 04-27-2014 01:40 AM

Powered by vBadvanced CMPS v3.2.3

All times are GMT -5. The time now is 04:10 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.