Just switched Trans & Diff to Amsoil Synthetic - Page 2

***520*** · 10-08-2006, 08:54 AM

Quote:

Originally Posted by 0bluesti4

hmmm...thats strange because COBB highly recommends redline MT-90: "Great balance of friction and lubrication. This is a good choice for a street/auto-x car. Highly Recommended."

Here's the link:
http://www.cobbtuning.com/tech/gearoil/index.html

im just going by what i have read on these boards.

Delaware Subaru · 10-08-2006, 09:35 AM

Quote:

Originally Posted by 0bluesti4

hmmm...thats strange because COBB highly recommends redline MT-90: "Great balance of friction and lubrication. This is a good choice for a street/auto-x car. Highly Recommended."

Here's the link:
http://www.cobbtuning.com/tech/gearoil/index.html

So does Andrew@Andrewtech. He recommends 1qt Motul & the rest Redline in the trans. I used the Subaru lsd for the rear diff.

tripod · 10-08-2006, 11:41 AM

Ya know guys, this trhead was started just to give my opinion on a product that I have used since the very early eighty's. I have used Amsoil in everthing I have owned, including an air cooled super vee, a formula ford, and my Buell. I have tried other products, and have always come back to amsoil. I am not trying to convince anyone of anything, merely stating my convictions.

As I said in an earlier post, be careful from whom you are taking any advice. If you don't know their pedigree, they might just be spouting off something that one of their friends said, totally without the first hand experience to back it up.

All synthetics are not made equal. I for one, tried Mobile 1 back in the 1970's. Didn't like it then, don't like it now. Found something that works, and stuck with it.

I know from past experience the difference synthetic gear lube makes in drivability and performance (mileage) in the winter, therefore my change over prior to winter. If I lived in a hot climate, I still would have switched over to synthetic, because it does not break down in high heat.

Whatever oil or synthetic you use, just make sure it meets all the specifications Subaru calls for, and you can't go wrong.

By the way, I am NOT an Amsoil distributer, so I am not trying to do a sales job. I am, however, a very knowledgable driver, race car builder, mechanic, and nationally licensed SCCA Tech inspector, and probably have been doing this more years than some of you have been alive.

Transworld · 10-08-2006, 12:09 PM

Which Amsoil did you use for the trans & Diff. I know that it was Amsoil Synthetic but what grade was it? I am going to change them next week.

tripod · 10-08-2006, 01:38 PM

Quote:

Originally Posted by Transworld

Which Amsoil did you use for the trans & Diff. I know that it was Amsoil Synthetic but what grade was it? I am going to change them next week.

I provided you with a link in the initial posting, but the 70/90 extreme

jsnuff1 · 10-11-2006, 10:32 PM

how often should you change the tranny/differential oil?

kessler89 · 10-11-2006, 11:25 PM

what about the lsd in the trans. on the 06's.... when i looked up gear oil on a oem distributer of subaru oils they had a lsd additive listed.......

^is why i'm hesitant to change my fluids

tripod · 10-12-2006, 05:39 AM

Amsiol also makes the LSD additive

solbergfan · 10-12-2006, 10:16 AM

You don't need an LSD additive. Just use the proper fluid-Subaru OEM or Motul 90PA LS oil.

**Majin** · 10-12-2006, 10:23 AM

so far i only have the Amsoil 75W-90 (no additive) and i have heard no chatter. everything is perfect and the car feels much smoother, especially shifting.

solbergfan · 10-12-2006, 12:25 PM

Quote:

Originally Posted by Majin

so far i only have the Amsoil 75W-90 (no additive) and i have heard no chatter. everything is perfect and the car feels much smoother, especially shifting.

Subaru released a TSB specifying that the STi must use a mechanical LSD oil in the rear diff, or damage can occur. Amsoil is fine for the trans, but I would use the proper stuff for the rear.

tripod · 10-12-2006, 12:48 PM

Quote:

Originally Posted by solbergfan

Subaru released a TSB specifying that the STi must use a mechanical LSD oil in the rear diff, or damage can occur. Amsoil is fine for the trans, but I would use the proper stuff for the rear.

Did you bother to click on the link in my first post to read the specs on the oil before you made this comment, or read my other post that says amsoil does also have a lsd additive (althought I don't think it is necessary, given the specs to begin with).

So you have specific specifications requirement recommended?

**Majin** · 10-12-2006, 12:54 PM

Quote:

Originally Posted by AMSOIL website

AMSOIL SEVERE GEAR™ is compatible with most limited slip differentials. If limited slip differential chatter occurs, add AMSOIL Slip-Lock™ friction modifier additive.

Amsoil is a great product.

solbergfan · 10-12-2006, 04:40 PM

Quote:

Originally Posted by tripod

Did you bother to click on the link in my first post to read the specs on the oil before you made this comment, or read my other post that says amsoil does also have a lsd additive (althought I don't think it is necessary, given the specs to begin with).

So you have specific specifications requirement recommended?

What I'm saying is that the rear diff oil is a special 90 weight mineral based oil for mechanical LSD's. It is not a normal gear oil. Amsoil doesn't make this type of product. The only stuff I've found that is compatible is the Motul, the OEM Subaru, and I believe Silkolene makes it also.

http://www.tunerworks.ca/products/?fn=detail&id=197

The Amsoil is 75W90 and since Subaru reccomends a straight 90 WT then I guess you're using the wrong stuff whether you use the additive or not.

And BTW I agree is Amsoil is a fantastic product. I've used the oil for years. And I use the Severe Gear in my Forester diff's.

**Majin** · 10-12-2006, 04:45 PM

also, just to let you know - when i went to my Subaru dealership to pick up the OE gear oil, they told me not to waste my money on it since it is just crappy gear oil they told me to get a nice synthetic oil that doesn't turn to garbage when it gets too hot.

has anyone been running the Amsoil Severe Gear 75W-90 for a good number of miles that can report back?

10-12-2006, 04:45 PM	#30
Majin A.X.D. Car: 2004 STi Location: LI, NY Posts: 13,023 IWSTI Addict since: Apr 2004 Trader Rating: (2)	also, just to let you know - when i went to my Subaru dealership to pick up the OE gear oil, they told me not to waste my money on it since it is just crappy gear oil they told me to get a nice synthetic oil that doesn't turn to garbage when it gets too hot. has anyone been running the Amsoil Severe Gear 75W-90 for a good number of miles that can report back? This ad is not endorsed by this member. Please register or login to hide this ad.

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10-08-2006, 11:41 AM	#18
tripod STI Driver Car: '06 WRX STi CGM Location: Libertyville, IL Posts: 258 IWSTI Addict since: Jun 2006 Trader Rating: (1)	Ya know guys, this trhead was started just to give my opinion on a product that I have used since the very early eighty's. I have used Amsoil in everthing I have owned, including an air cooled super vee, a formula ford, and my Buell. I have tried other products, and have always come back to amsoil. I am not trying to convince anyone of anything, merely stating my convictions. As I said in an earlier post, be careful from whom you are taking any advice. If you don't know their pedigree, they might just be spouting off something that one of their friends said, totally without the first hand experience to back it up. All synthetics are not made equal. I for one, tried Mobile 1 back in the 1970's. Didn't like it then, don't like it now. Found something that works, and stuck with it. I know from past experience the difference synthetic gear lube makes in drivability and performance (mileage) in the winter, therefore my change over prior to winter. If I lived in a hot climate, I still would have switched over to synthetic, because it does not break down in high heat. Whatever oil or synthetic you use, just make sure it meets all the specifications Subaru calls for, and you can't go wrong. By the way, I am NOT an Amsoil distributer, so I am not trying to do a sales job. I am, however, a very knowledgable driver, race car builder, mechanic, and nationally licensed SCCA Tech inspector, and probably have been doing this more years than some of you have been alive.

10-08-2006, 12:09 PM	#19
Transworld Senior STI Driver Car: 2005 STi Fav Mod: Coming Soon Location: Canada Posts: 331 IWSTI Addict since: Jun 2005 Trader Rating: (0)	Which Amsoil did you use for the trans & Diff. I know that it was Amsoil Synthetic but what grade was it? I am going to change them next week.

10-11-2006, 10:32 PM	#21
jsnuff1 STI Driver Car: OBP 06 STI Location: New York Posts: 287 IWSTI Addict since: Aug 2006 Trader Rating: (0)	how often should you change the tranny/differential oil?

10-11-2006, 11:25 PM	#22
kessler89 Spec C Club Car: Z06 Fav Mod: LS6 Location: Ohio Posts: 1,352 IWSTI Addict since: May 2006 Trader Rating: (7)	what about the lsd in the trans. on the 06's.... when i looked up gear oil on a oem distributer of subaru oils they had a lsd additive listed....... ^is why i'm hesitant to change my fluids

10-12-2006, 05:39 AM	#23
tripod STI Driver Car: '06 WRX STi CGM Location: Libertyville, IL Posts: 258 IWSTI Addict since: Jun 2006 Trader Rating: (1)	Amsiol also makes the LSD additive

10-12-2006, 10:16 AM	#24
solbergfan Senior STI Driver Car: 05 CGM STi Location: Southeastern PA Posts: 355 IWSTI Addict since: Jun 2005 Trader Rating: (0)	You don't need an LSD additive. Just use the proper fluid-Subaru OEM or Motul 90PA LS oil.

10-12-2006, 10:23 AM	#25
Majin A.X.D. Car: 2004 STi Location: LI, NY Posts: 13,023 IWSTI Addict since: Apr 2004 Trader Rating: (2)	so far i only have the Amsoil 75W-90 (no additive) and i have heard no chatter. everything is perfect and the car feels much smoother, especially shifting.