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04-14-2009, 12:50 AM | #1 |
*** Banned ***
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Join Date: Apr 2009
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MAIC
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Motul or Amsoil Gear Oil for the 6mt and STi Diff?
I have read the gear oil faq's, unabomber's threads and just got done searching nasioc and iwsti. Trying to figure out what would be the better route to go.... Please don't post anything about the 5mt and wrx diff, this is for a 2004 STI...
Was thinking between Amsoil or Motul, also see more threads about Motul problems vs hardly any using Amsoil. This is what I was looking at. Amsoil Severe gear "rear diff" http://www.amsoil.com/storefront/svg.aspx?zo=515729 Slip Lock "rear diff" https://www.amsoil.com/storefront/ada.aspx Long Life "tranny" http://www.amsoil.com/storefront/fgr.aspx?zo=515729 Motul 6MT Option A "Motul 75/90 and Motul 90PA" http://www.fastwrx.com/trsekit.html Does the Motul 90PA require a additive? |
04-14-2009, 09:30 AM | #2 |
Big Ron
Super Moderator Member#: 18062
Join Date: Apr 2002
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MAIC
Location: I can save you a ton of cash
Vehicle:on car parts so PM me b4 j00 buy |
You can ask Jesus, Mohammad, and the Dahli Llama and you won't get the right answer as there is no right answer. The Maintenance FAQ states the popular oils, use one of them. You are MAIC, so your best best bet is to use fastwrx.com as they are local and local advice is the best. Call Dan and axe him.
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04-14-2009, 02:19 PM | #3 |
Vendor
Member#: 111780
Join Date: Apr 2006
Chapter/Region:
MWSOC
Location: Schaumburg, IL
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The 90PA has the additive in it already. You can use the Motul Gear 300 in the front and the back without any worries.
-Dylan @ DS1 |
04-15-2009, 02:43 AM | #4 |
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Well I searched some more and still found more horror stories using Motul. Think I will use the Amsoil gear oil. Already using Amsoil 10w-30, larger EA013 Amsoil Synthetic Media Oil Filter. Might as well go all Amsoil in 3K miles which will put all fluid changes on 100K. Of course I might as well get a Amsoil filter and sock for the Aps intake, snag some Amsoil Synthetic ATF for the power steering and change the plugs.
How much of the 4oz bottle of Slip Lock is supposed to be added to the rear? |
04-15-2009, 12:42 PM | #5 |
Scooby Guru
Member#: 767
Join Date: Jan 2000
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Tri-State
Location: N.J.
Vehicle:04 FXT 20 OB Onyx XT |
Go with the Severe Gear in the front. No idea on the Slip Lock.
-Dennis |
04-16-2009, 01:14 AM | #6 |
Scooby Specialist
Member#: 132301
Join Date: Nov 2006
Chapter/Region:
Tri-State
Location: Central NJ
Vehicle:07 WRX Limited 6MT 20G - SWP - SOLD |
I've put Severe gear 75w90 or 75w110 in several Subaru rears. I've never used / needed the Slip Lock additive (in a Subaru).
Even in most vehicles that do specify the need for an additive, when using Severe Gear, the additive was not needed. I've only had to add it in one case, which was my brothers truck that tows a heavy trailer every day. |
04-16-2009, 01:51 AM | #7 |
Scooby Guru
Member#: 15822
Join Date: Feb 2002
Location: TOPOHTO
Vehicle:1999 WRB GM6 2.34 LR destroker |
if your rear diff is plated, like spec c, I would highly recomend using PA90
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