Go Back   Jeep Garage - Jeep Forum > Jeep Platform Discussion > Grand Cherokee - WK > Engine Performance/Intake/Exhaust

Join Jeep Garage Today
Reply
 
Thread Tools Display Modes
 
  #1  
Old 10-03-2011, 08:52 AM
ItsAJeepThing's Avatar
Senior Member
My Jeep: 2009 3.7L WK
 
Join Date: Jun 2009
Location: BROOKLYN, NYC
Posts: 1,006
Thanks: 7
Thanked 12 Times in 12 Posts
Rep Power: 388284
ItsAJeepThing has a reputation beyond reputeItsAJeepThing has a reputation beyond reputeItsAJeepThing has a reputation beyond reputeItsAJeepThing has a reputation beyond reputeItsAJeepThing has a reputation beyond reputeItsAJeepThing has a reputation beyond reputeItsAJeepThing has a reputation beyond reputeItsAJeepThing has a reputation beyond reputeItsAJeepThing has a reputation beyond reputeItsAJeepThing has a reputation beyond reputeItsAJeepThing has a reputation beyond repute
Regular oil vs synthetic

So I just got my 09 WK V6 3.7L a few days ago and I want to change the oil in the car. My question is, which oil should i use "Mobile1, Castrol, Royal Purple and etc" and what is the difference between regular oil and synthetic oil besides the 3k miles vs 6k miles. I have a 99WJ and i always used regular Castrol GTX in it, so i am not sure what to use in the WK. Any help is highly appreciated
__________________

__________________
1999 Jeep Grand Cherokee Laredo I6 4.0 227k miles SOLD 10/13/11
2009 Jeep Grand Cherokee Limited V6 3.7 29k miles
SRT8 Front/Rear bumpers, SRT resonators/tips, Flowmaster Super 44 series muffler, KnN 77 series CAI, 8000k HIDs Lows/Fogs, Brilliant Black SRT Grill, 22" Gloss Black SRT Reps, 20% Tints, and a lot more to come =]


Reply With Quote
  #2  
Old 10-03-2011, 10:33 AM
01grand's Avatar
Super Moderator

My Jeep: 2001 4.7L WJ
 
Join Date: Dec 2010
Location: Prior Lake, MN
Posts: 1,803
Thanks: 37
Thanked 60 Times in 59 Posts
Rep Power: 54290
01grand has a reputation beyond repute01grand has a reputation beyond repute01grand has a reputation beyond repute01grand has a reputation beyond repute01grand has a reputation beyond repute01grand has a reputation beyond repute01grand has a reputation beyond repute01grand has a reputation beyond repute01grand has a reputation beyond repute01grand has a reputation beyond repute01grand has a reputation beyond repute
Re: Regular oil vs synthetic

Synthetic oil can usually be run longer than conventional, can provide better fuel economy, and can help reduce wear during cold starts because it will flow better at cold temps. As long as the oil you use has the API logo on it it will provide adequate, warranty level protection. I have always ran synthetic because it lasts longer and is better in cold Minnesota winters. Also make sure you get a decent oil filter, mobil 1 or purolator are good, avoid fram. For oil brands I have used and recommend valvoline synpower, mobil 1, and Castrol syntec. I have heard good things about royal purple but it's expensive.
__________________

__________________
Aaron

My Jeep: 2001 Grand Cherokee Limited, 245/65R17 Falken Rocky Mountain ATS, K&N drop in air filter, Bilstein HD's. De-badged, eagle-eye LED Tails & LED 3rd brake light, Addco front and rear sway bars, Superchips tuned & TM snip, interior 6k LED's, Gen3 ccfl projectors with Volt 6k HID lows, akebono brake upgrade with R1 Concepts premium rotors.
Reply With Quote
  #3  
Old 10-03-2011, 11:33 AM
Redpit's Avatar
Member
My Jeep: 2008 5.7L WK
 
Join Date: Jul 2011
Location: NY
Posts: 330
Thanks: 0
Thanked 13 Times in 13 Posts
Rep Power: 2943
Redpit has a reputation beyond reputeRedpit has a reputation beyond reputeRedpit has a reputation beyond reputeRedpit has a reputation beyond reputeRedpit has a reputation beyond reputeRedpit has a reputation beyond reputeRedpit has a reputation beyond reputeRedpit has a reputation beyond reputeRedpit has a reputation beyond reputeRedpit has a reputation beyond reputeRedpit has a reputation beyond repute
Re: Regular oil vs synthetic

^x2 very good thorough answer. It really boils down to personal preference. That being said I use synthetic in all my rides. My main reason for doing so is that my cars/trucks seem to run smoother and quieter.
__________________

Gibson Exhaust, AFE Stage 2 Intake, Diablosport programmer, FlyinRyan trans tune & PCM tune, Brush Guard, Tail light Guards, HID Lows & Fogs, LED interior lights, SRB 100w Fog lights, Plasti-dipped wheels, 245/70/17 General Grabber AT2's, and Vent Visor Rain Guards
Reply With Quote
  #4  
Old 10-04-2011, 10:50 AM
Member
 
Join Date: Feb 2010
Posts: 843
Thanks: 0
Thanked 6 Times in 5 Posts
Rep Power: 7874
dmsfun has a reputation beyond reputedmsfun has a reputation beyond reputedmsfun has a reputation beyond reputedmsfun has a reputation beyond reputedmsfun has a reputation beyond reputedmsfun has a reputation beyond reputedmsfun has a reputation beyond reputedmsfun has a reputation beyond reputedmsfun has a reputation beyond reputedmsfun has a reputation beyond reputedmsfun has a reputation beyond repute
Re: Regular oil vs synthetic

Synthetics do not breakk down as quickly and are great for cold start ups, where most engine wear occurs. I would not recommend RP oil; tried it and motor ran rougher and louder; Valvolilne synpower is what I now use and is much better; smoother, quieter. better mpg. RP clalims for HP is BS marketing. If it were truthful, race teams wouuld use it, but no NASCAR, Indy, FI etc.. teams use RP that I have seen.
__________________
2006 GC Overland QD II
5.7 Hemi, Modern Muscle 85 mm CNC ported TB, Apexi super voltage stabilizer, Billet Tech. Catch Can, Koni FSD shocks/struts, SRT8 sway bars, Cooper AT3's, Amsoil fluids, Diablosport Intune CMR tuned by Hemifever tuning.
Reply With Quote
  #5  
Old 10-04-2011, 11:26 AM
ItsAJeepThing's Avatar
Senior Member
My Jeep: 2009 3.7L WK
 
Join Date: Jun 2009
Location: BROOKLYN, NYC
Posts: 1,006
Thanks: 7
Thanked 12 Times in 12 Posts
Rep Power: 388284
ItsAJeepThing has a reputation beyond reputeItsAJeepThing has a reputation beyond reputeItsAJeepThing has a reputation beyond reputeItsAJeepThing has a reputation beyond reputeItsAJeepThing has a reputation beyond reputeItsAJeepThing has a reputation beyond reputeItsAJeepThing has a reputation beyond reputeItsAJeepThing has a reputation beyond reputeItsAJeepThing has a reputation beyond reputeItsAJeepThing has a reputation beyond reputeItsAJeepThing has a reputation beyond repute
Re: Regular oil vs synthetic

Thank u guys, I guess ill go with Mobile 1 synthetic
__________________
1999 Jeep Grand Cherokee Laredo I6 4.0 227k miles SOLD 10/13/11
2009 Jeep Grand Cherokee Limited V6 3.7 29k miles
SRT8 Front/Rear bumpers, SRT resonators/tips, Flowmaster Super 44 series muffler, KnN 77 series CAI, 8000k HIDs Lows/Fogs, Brilliant Black SRT Grill, 22" Gloss Black SRT Reps, 20% Tints, and a lot more to come =]


Reply With Quote
  #6  
Old 10-05-2011, 09:33 AM
Member
 
Join Date: Jan 2010
Location: Philadelphia
Posts: 39
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 1689
Jeffjs7 is on a distinguished road
Re: Regular oil vs synthetic

After all of my research, I decided on Mobile 1, too. Ended up getting a Fram Tough Guard filter (10k miles supposedly). I'm confident in my decision.
__________________
Reply With Quote
  #7  
Old 10-05-2011, 05:35 PM
nomoney's Avatar
Member
My Jeep: 2006 4.7L WK
 
Join Date: Sep 2011
Location: Quebec Can
Posts: 7
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 1046
nomoney is on a distinguished road
Re: Regular oil vs synthetic

I use regular oil (5W30) and change it more often, it allows you to look under the suv and find little problem to fix before they become big problems. (seals, boots, ect... )After all it is a Jeep! Got 140,000 Km on my 2006
__________________

__________________
New fog lamps
Reply With Quote
Reply

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
Synthetic vs. Conventional Oil, which to use 5.7L NHman Tech Tips/DIY/How To 26 02-04-2012 11:32 PM
Switching to Synthetic Oil in High Mileage Engine barns1 Grand Cherokee - WK 16 12-23-2010 01:46 PM
Synthetic vs. Conventional Oil for V6. Daved51 Grand Cherokee - WK2 - 10 10-09-2010 09:46 PM
Motor break-in period-synthetic oil gc4x4 Grand Cherokee - WK 10 04-25-2010 11:20 AM
switch to synthetic oil B.P.O.D Grand Cherokee - WK 27 10-01-2009 01:41 PM

Powered by vBadvanced CMPS v3.2.3

All times are GMT -5. The time now is 06:15 PM.


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