Synthetic or Dino Diff oil? - TTORA Forum
 
LinkBack Thread Tools Display Modes
post #1 of 12 (permalink) Old 11-17-2008, 06:17 PM Thread Starter
Veteran Member
 
Gerdo's Avatar
 
Join Date: Jun 2007
Location: Littleton, Co.
Posts: 759
Synthetic or Dino Diff oil?

I've been using Synthetics for years. I read somewhere that some dealership service areas are switching back to Dino oil in diffs because they have experienced alot of breakage with Synthetics. They seem to feel that Dino oil protects better. Has anyone heard this before?

My son needs to do his diffs and isn't sure what to use?

2000 4Runner.

3rd gen 4runner fuel tank skidplates http://lilskipsoffroad.wordpress.com/
Gerdo is offline  
Sponsored Links
Advertisement
 
post #2 of 12 (permalink) Old 11-18-2008, 12:36 AM
Veteran Member
 
Nate's Avatar
 
Join Date: Jul 2008
Location: frederick,co
Posts: 661
i have never heard that. i use synthetic, it works fine for me

4xinnovations sliders,lockers, Ome 881's,
Rear 63" chevys , Arb front bumper,
Custom rear bumper, winch, Natebuilt skids and some other stuff
Nate is offline  
post #3 of 12 (permalink) Old 11-18-2008, 01:24 AM
Veteran Member
 
RedRunnertc's Avatar
 
Join Date: Dec 2005
Location: Houston, TX
Posts: 15,035
thefatkid was telling me a little about this. I think he said the seals were not as compatible with synthetic and they have seen some increased leakage from people running synthetic, and they use dino only.

It seems that I don't really get to take advantage of extended drain intervals, so I will probably just do dino when it comes time.

Former President - CO Chapter
Founding President - OH Chapter

'93 4Runner lockers, armor, tcases, & stuff

'14 Cadillac CTS VSport

Check out pix at www.4wheelingoh.shutterfly.com/action
RedRunnertc is offline  
post #4 of 12 (permalink) Old 11-18-2008, 04:32 AM
ike
Veteran Member
 
ike's Avatar
 
Join Date: Sep 2006
Location: Loveland CO
Posts: 20,354
I was also told what Troy just stated.

Degenerate

I am not lost


98 mazda protege
99 v6 trd taco-some stuff
07 Ninja 650R
ike is offline  
post #5 of 12 (permalink) Old 11-18-2008, 09:21 AM Thread Starter
Veteran Member
 
Gerdo's Avatar
 
Join Date: Jun 2007
Location: Littleton, Co.
Posts: 759
I know synthetics don't thermo break down. If you do the recomended changes does it matter? Most vehicles come from the factory with Dino.

2000 4Runner.

3rd gen 4runner fuel tank skidplates http://lilskipsoffroad.wordpress.com/
Gerdo is offline  
post #6 of 12 (permalink) Old 11-18-2008, 10:22 AM
Senior Member
 
Blowntaco's Avatar
 
Join Date: Oct 2005
Posts: 435
Its not the synthetic oils it's the seals that are'nt compatable
Blowntaco is offline  
post #7 of 12 (permalink) Old 11-18-2008, 10:49 AM
Veteran Member
 
colorado125's Avatar
 
Join Date: Dec 2004
Location: Fort Collins
Posts: 1,608
Send a message via Yahoo to colorado125
Quote:
Originally Posted by Blowntaco View Post
Its not the synthetic oils it's the seals that are'nt compatable
So are there seals you can get that are compatible with the synthetic fluids?

2002 Dcab, 33" Toyo Open Country AT's on FJ80 rims, full OME suspension, 1" body lift, TRD Exhaust, SC, and Trans cooler, ARB Bullbar, SleeOffroad sliders, future is gears, front locker and cbi Fab rear bumper
colorado125 is offline  
post #8 of 12 (permalink) Old 11-18-2008, 10:59 AM
Veteran Member
 
devinsixtyseven's Avatar
 
Join Date: Oct 2006
Location: Denver
Posts: 4,858
I have never had a problem with synthetic oil & seals, ever. I know a few people who have experienced leaking seals with dino oil.

So I wouldn't say it's conclusive.

What is worth mentioning is that some of those synthetics are not viscous enough to climb the ring gear and properly lubricate the differential.

I'm running 85/140 dino in the rear differential, and 75/90 synth in the front diff and t-case for that reason, but I don't have a stock rear diff. I ran 75/90 synth for about 100k miles without any seal problems in the rear diff, and have about 120K on synth in the front diff and t-case.

I would not expect any problems running 75/90 synth in a stock rear end, and I don't think there's any need to run the 85/140 dino that I'm using, if you have a normal Toyota rear diff.

YMMV.

-Sean
devinsixtyseven is offline  
post #9 of 12 (permalink) Old 11-18-2008, 12:17 PM
Veteran Member
 
00regcab's Avatar
 
Join Date: Aug 2007
Location: Brighton, Co
Posts: 7,910
Send a message via AIM to 00regcab
I've been running Valvoline 75-140 Synthetic in my diff for roughly 3500 miles now, i had a slight leak from one of the outer axle seals at first, replaced it and i havent leaked a drop since.

All of the seals are pretty new though (roughly 10k miles)
00regcab is offline  
post #10 of 12 (permalink) Old 11-18-2008, 12:43 PM
Veteran Member
 
fjcruzer's Avatar
 
Join Date: Dec 2006
Location: Denver
Posts: 4,141
I've never had a mechanic recommend synthetic, and several that I trust recommend Dino. I've never argued the point and the only diff problems I've had are more likely attributed to off-road driving than fluid. I've run nearly 500,000 miles on the various Toys I've had, never used synthetic and never had diff issues until the FJ, but again, more likely the ridiculous number of trails I've driven the last 2 years.

Eric Ross
Denver, CO
07FJC

“Not all who wander are lost…”

http://curtisparkcruiser.weebly.com/

ARB this and that, Warn this and that, OME this and that, Armor this and that, Recovery & Repair this and that...
fjcruzer is offline  
post #11 of 12 (permalink) Old 11-18-2008, 12:49 PM
Veteran Member
 
RedRunnertc's Avatar
 
Join Date: Dec 2005
Location: Houston, TX
Posts: 15,035
Sean - you want something that sticks and will climb the ring gear, try Redline Heavy Shockproof!

Former President - CO Chapter
Founding President - OH Chapter

'93 4Runner lockers, armor, tcases, & stuff

'14 Cadillac CTS VSport

Check out pix at www.4wheelingoh.shutterfly.com/action
RedRunnertc is offline  
post #12 of 12 (permalink) Old 11-18-2008, 02:16 PM
Veteran Member
 
Join Date: May 2007
Location: Littleton
Posts: 2,200
The seals were updated in late 03 to a more synthetic friendly design. The previous seals were know to leak when synthetic oil were used. Synthetic oil is supposed to carry the same weight ratings as their dino cousins but are often under rated. Lubrication ratings equal the dino ratings at a thinner oil level, ok for the bearings, not ok for the seals.
thefatkid is offline  
Reply
Gear in this thread - Powered by O'Reilly Auto Parts

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the TTORA Forum 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 email 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.



Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Similar Threads
Thread Thread Starter Forum Replies Last Post
Quaker State - 4x4 Synthetic Blend vs Full Synthetic ScreamingTaco Performance/Engine/Exhaust 3 03-23-2007 10:37 AM
Synthetic to Dino oil in the transmission jessevic Early Tacoma Tech 9 02-24-2007 02:47 AM
dino oil bassholemm Tech 3 01-24-2007 07:42 PM
Dino Oil Problems pdxtaco Newbie Tech 14 01-19-2007 01:26 AM

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 On
Pingbacks are On
Refbacks are On

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