0w-20 jeep 3.8L - JeepForum.com
 
LinkBack Thread Tools
post #1 of 11 Old 01-18-2014, 05:52 AM Thread Starter
blackjeep05
Registered User
2008 JK Wrangler 
 
Join Date: Sep 2012
Location: mckinney
Posts: 1,456
0w-20 jeep 3.8L

Anyone using 0w-20 in the Jeep 3.8L? Wondering if anyone had good success or not.


Soccer six in the mix.
blackjeep05 is offline  
Sponsored Links
Advertisement
 
post #2 of 11 Old 01-18-2014, 07:23 AM
Butterjeep
Registered User
2015 WK 
 
Join Date: May 2012
Location: Edgewater
Posts: 518
Especially living in TX, I would not go 0w20. I wouldn't even go 5w20. Depending on how many miles you have on your 3.8, I would run 5w30, 10w30 or even 10w40. 5w20 was spec'd on the 3.8 to improve fuel consumption. Thinner oil flows better and takes less energy to pump (think of drinking milk through a straw vs drinking a milkshake through a straw).

So if anything, stick with the factory recommended, maybe go thicker, but I certainly would not go thinner.

2014 Mustang GT Track Pack
2015 WK2 Limited 4x4
Butterjeep is offline  
post #3 of 11 Old 01-18-2014, 10:05 AM
Jiblet
Registered User
2008 JK Wrangler 
 
Join Date: Dec 2008
Location: Boston, MA
Posts: 972
5w-20 and 0w-20 are still both in the 20 grade at 100C, right?

You'd have to look at other aspects of the particular brand you're using. Like the hths value. The real gurus on the oil forums could tell you more than I know...

For the 3.8 in Texas there's not likely much benefit in 0w- anything.
Jiblet is offline  
post #4 of 11 Old 01-18-2014, 10:15 AM Thread Starter
blackjeep05
Registered User
2008 JK Wrangler 
 
Join Date: Sep 2012
Location: mckinney
Posts: 1,456
True I will probably stick with the 5w-20 I have always used. I have been running full synthetic Valvoline in everything on the JKU. Smooth as silk.

Soccer six in the mix.
blackjeep05 is offline  
post #5 of 11 Old 01-18-2014, 11:31 AM
Jiblet
Registered User
2008 JK Wrangler 
 
Join Date: Dec 2008
Location: Boston, MA
Posts: 972
Quote:
Originally Posted by blackjeep05
True I will probably stick with the 5w-20 I have always used. I have been running full synthetic Valvoline in everything on the JKU. Smooth as silk.
Sounds good. What's your oil change interval?

Google: "BITOG 0w-20 vs 5w-20"
for some good info.
Jiblet is offline  
post #6 of 11 Old 01-18-2014, 12:38 PM Thread Starter
blackjeep05
Registered User
2008 JK Wrangler 
 
Join Date: Sep 2012
Location: mckinney
Posts: 1,456
I go about 3500 to 4k or almost 6 months which ever comes first.

Soccer six in the mix.
blackjeep05 is offline  
post #7 of 11 Old 01-18-2014, 12:44 PM
BacasJK
Registered User
2011 JK Wrangler 
 
Join Date: Aug 2011
Location: Arlington
Posts: 180
Quote:
Originally Posted by Jiblet View Post
5w-20 and 0w-20 are still both in the 20 grade at 100C, right?

You'd have to look at other aspects of the particular brand you're using. Like the hths value. The real gurus on the oil forums could tell you more than I know...

For the 3.8 in Texas there's not likely much benefit in 0w- anything.
0w is what you want at start up since thats where the engine wears out the most. I run the 0-40w with great results. Less ticking noise at start up, because of the 0w, and the 40w to keep the oil thick at operating temperature.
Just my .02.

Martin
BacasJK is offline  
post #8 of 11 Old 01-18-2014, 01:43 PM
Jiblet
Registered User
2008 JK Wrangler 
 
Join Date: Dec 2008
Location: Boston, MA
Posts: 972
Quote:
Originally Posted by BacasJK
0w is what you want at start up since thats where the engine wears out the most. I run the 0-40w with great results. Less ticking noise at start up, because of the 0w, and the 40w to keep the oil thick at operating temperature. Just my .02. Martin
You're theoretically correct but depending on the brand oil, an 0w may not be thinner than another brands 5w at whatever the cold start temp may be. Have to check the actual PDS for the data.

For comparison, I'm told "Castrol edge 5w-20 is considerably lighter than amsoil 0w-20 at temps down to -15."
Jiblet is offline  
post #9 of 11 Old 01-19-2014, 08:54 AM
SoK66
Registered User
2009 JK Wrangler 
 
Join Date: Jul 2011
Location: Durango
Posts: 1,434
No way I'd run that viscosity in a JK 3.8L. 5w-30 at a minimum.
SoK66 is offline  
post #10 of 11 Old 01-19-2014, 05:15 PM
Nsiavosh90
Registered User
2007 JK Wrangler 
 
Join Date: Sep 2013
Location: Flushing
Posts: 15
I have a 2007 sahara unlimited with 208,xxx miles on her (see my profile for the rest) and been running mobil one full synthetic 0w-20 for cold startup reasons here in Michigan. Noticeably quieter engine noise on start up, faster warm up time or at least the throttle bump on start up doesn't last that long. Can't tell if there's a fuel mileage difference. Don't see any reason not to run this in the winter in my 3.8 when normal driving conditions are all your gonna be doing. Be very very careful when wheeling though as oil temps will sneak up when in 4 low doing hi rpm low mph stuff for prolong periods of time. Will be running 5-20 for normal spring/summer driving and 10-40 for trips like silver lake sand dunes and such where I know excessive heat is going to be present
Nsiavosh90 is offline  
post #11 of 11 Old 01-19-2014, 06:11 PM
BacasJK
Registered User
2011 JK Wrangler 
 
Join Date: Aug 2011
Location: Arlington
Posts: 180
Quote:
Originally Posted by Nsiavosh90 View Post
I have a 2007 sahara unlimited with 208,xxx miles on her (see my profile for the rest) and been running mobil one full synthetic 0w-20 for cold startup reasons here in Michigan. Noticeably quieter engine noise on start up, faster warm up time or at least the throttle bump on start up doesn't last that long. Can't tell if there's a fuel mileage difference. Don't see any reason not to run this in the winter in my 3.8 when normal driving conditions are all your gonna be doing. Be very very careful when wheeling though as oil temps will sneak up when in 4 low doing hi rpm low mph stuff for prolong periods of time. Will be running 5-20 for normal spring/summer driving and 10-40 for trips like silver lake sand dunes and such where I know excessive heat is going to be present


Martin
BacasJK is offline  
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the JeepForum.com forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid e-mail address for yourself.



Email Address:
OR

Log-in









Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Posting Rules  
You may post new threads
You may 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 On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome