full synthetic oil. - Jeep Wrangler Forum

Go Back   Jeep Wrangler Forum > TJ Jeep Wrangler Forum > TJ General Discussion Forum

Join Wrangler Forum Today

Thread Tools

Please support our sponsors and let them know you heard about them on WranglerForum.com
Old 10-18-2006, 12:25 AM   #1
JeepGuyLJ's Avatar
Join Date: Mar 2006
Location: Van Nuys, CA
Posts: 480
full synthetic oil.

I was also wondering if i can use full synthetic oil on my 4.0 lj do i get better preformance out of full synthetic oil or there is no point. thank you.
JeepGuyLJ is offline   Quote
Old 10-18-2006, 05:24 AM   #2
Odhinn's Avatar
Join Date: Aug 2006
Posts: 2,147
In my experience you can go longer between oil changes, but the filter still needs to be changed at the normal intervals. I usually do mine at 3k to 4k miles. The oil I use is rated for much more but the filters still get saturated at around 3 or 4. If the filter goes into bypass it does nothing for the oil. I know when I was a teen, and a oil jockey, there was a company doing an experiment on a truck with synthetic. They ran 150k miles on that truck. They never changed the oil only the filter and added the amount lost from changing the filter. They always brought the truck into the shop I worked at for the filter change at 3k miles. When the engine tear down was complete after the experiement was done there was normal wear but nothing like would be in an engine with that many mile on it. I dont recommend going this long long without changing the oil, but seeing it with my own eyes convinced me to start using synthetic when I was able to afford it on a regular basis. As far as actual increases engine performance, I dont notice a difference but maybe someone else here has. I hope I made sense when typing this


Recently returned from the Jeep Dead.
Proud daddy to a New baby Jeep Girl.
Odhinn is offline   Quote
Old 10-18-2006, 12:08 PM   #3
Knows a couple things...

WF Supporting Member
Jerry Bransford's Avatar
Join Date: Nov 2005
Location: Escondido, Calif.
Posts: 40,830
Synthetics and mineral-based lubes absorb contaminants like combustion byproducts, acids, etc. at the same rates. And those contaminants cannot be filtered out by a conventional oil filter. So while the synthetic oil itself may last longer, it still absorbs contaminants at the same rate that mineral-based oil does which can only be removed by changing the oil.

So the hype about a synthetic oil being able to go longer before being changed is simply a myth. Change the oil and filter together at the recommended and reasonable intervals and your engine will be well protected, synthetic or mineral-based.

Only in extremely cold conditions is a synthetic oil worth it's weight in gold due to its better flow abilities when very cold.
When you have a choice, buy American.
Jerry Bransford is offline   Quote
Old 10-18-2006, 03:59 PM   #4
JeepGuyLJ's Avatar
Join Date: Mar 2006
Location: Van Nuys, CA
Posts: 480
So it dosent matter which oil i use my jeep will still run good and cool right. thank you.
JeepGuyLJ is offline   Quote
Old 10-18-2006, 04:29 PM   #5
amerijeep's Avatar
Join Date: Apr 2005
Location: Mississippi.
Posts: 4,057
Changing it regularly is the key.
To all who serve, Thank You.
amerijeep is offline   Quote
Old 10-28-2006, 07:21 PM   #6
Join Date: Jun 2006
Location: Austin, Texas
Posts: 66
I've used Mobil-1 Fully Synthetic oil the last couple of oil changes in my 02 TJ. I really haven't noticed much of any performance change vs. the conventional oil I used before but I have read that it holds up better. They have pretty comparable prices at Wal-mart if you buy the 5 quart jug.

AggieChris is offline   Quote

Thread Tools

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 Oil? tigertribe TJ General Discussion Forum 35 01-03-2016 02:45 PM
Synthetic Oil Worth it? AggieChris TJ Tech Forum 16 07-20-2010 10:32 AM
engine oil? Giancarlo TJ Tech Forum 10 09-08-2009 12:51 PM
First oil change should i go full synthetic? JKbrock TJ Tech Forum 9 01-08-2009 02:21 AM
Want to change from half to full solid doors 92jeepster48195 General Jeep Discussion 5 09-01-2007 11:32 PM

Download our Mobile App

» Featured Product

All times are GMT -5. The time now is 03:53 AM.

User Alert System provided by Advanced User Tagging v3.1.0 (Pro) - vBulletin Mods & Addons Copyright © 2016 DragonByte Technologies Ltd.

Jeep®, Wrangler, Liberty, Wagoneer, Cherokee, and Grand Cherokee are copyrighted and trademarked to Chrysler Motors LLC.
Wranglerforum.com is not in any way associated with the Chrysler Motors LLC