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2015 Subaru Forester XT differential oil change #4808307
07/08/18 11:44 AM
07/08/18 11:44 AM
Joined: Jun 2017
Posts: 74
Canada
jbutch Offline OP
jbutch  Offline OP

Joined: Jun 2017
Posts: 74
Canada
Hello bitog!

As I am approaching 60 000 kms, I decided to change both differentials' oil.

I read a post on subaruforester.org and it looks pretty simple, so I bought amsoil svg 75w-90 for both differentials. A while ago it was the best gear oil from what I read online, is it still a good oil?

Also, in the manual it says that the front differential shoud use something called extra mt as it is in the same window as the manual transmission. It says GL5 could be used but could affect drivability...

Is the Amsoil svg 75w-90 a good oil for the front diff?





Re: 2015 Subaru Forester XT differential oil change [Re: jbutch] #4808316
07/08/18 11:53 AM
07/08/18 11:53 AM
Joined: Aug 2017
Posts: 798
MN
14Accent Online content
14Accent  Online Content

Joined: Aug 2017
Posts: 798
MN
We use SVG in all front and rear diffs on Subaru's at my shop, never had a single issue.


2013 Chevrolet Volt - Saves enough in fuel to pay for itself!

2003 Cadillac Seville STS - The winter "beater", it uses the Volt's fuel
Re: 2015 Subaru Forester XT differential oil change [Re: jbutch] #4808411
07/08/18 02:19 PM
07/08/18 02:19 PM
Joined: May 2012
Posts: 2,455
The land of USA-made Subies!
SubieRubyRoo Offline
SubieRubyRoo  Offline

Joined: May 2012
Posts: 2,455
The land of USA-made Subies!
SVG is regarded as one of the best gear oils, period. There is no "front differential" per se on a stick Subaru, the diff is integrated and shares the manual transmission lubricant. There is a separate differential for auto/CVT.

If you weren't using SVG, the only other gear oil I have used that I would wholeheartedly recommend is Motul Gear 300.

Re: 2015 Subaru Forester XT differential oil change [Re: jbutch] #4808562
07/08/18 06:16 PM
07/08/18 06:16 PM
Joined: Jan 2009
Posts: 6,801
New England
gathermewool Online content
gathermewool  Online Content

Joined: Jan 2009
Posts: 6,801
New England
Motul Gear 300 is the best, on paper. I have some leftover (and more hat I picked up a couple of years ago) in my stash for my FXT...whenever I get around to changing it.

I'd personally choose Redline over this, too.

Amsoil SVG, like the Gear 300 and Motul's Gear 300, is very much overkill. I asked Redline for their advice on my previous STI and they told me Shock Proof was overkill.


'14 Forester XT FA20DIT (Cobb Stage 1)
Edge 0W-40 + FU filter (64,774 miles)
'15 Legacy FB25 (OEM Stage, uh, neg. 7?)
Edge 0W-20 + FU filter (40,803 miles)
Re: 2015 Subaru Forester XT differential oil change [Re: jbutch] #4808564
07/08/18 06:20 PM
07/08/18 06:20 PM
Joined: Aug 2003
Posts: 13,432
NE,Ohio
Rand Offline
Rand  Offline

Joined: Aug 2003
Posts: 13,432
NE,Ohio
yes its fine, as mentioned the Manual transmission model shares a sump with the front diff so they spec a different oil for shifting quality and fuel economy.

since you have the cvt.. you have the right oil 75w90 GL-5

just MAKE SURE you drain the diff in the front.. dont drain the cvt!

rear is easy.


2019 Jeep Cherokee Trailhawk 2.0T
Re: 2015 Subaru Forester XT differential oil change [Re: jbutch] #4809920
07/10/18 07:58 AM
07/10/18 07:58 AM
Joined: Jan 2009
Posts: 6,801
New England
gathermewool Online content
gathermewool  Online Content

Joined: Jan 2009
Posts: 6,801
New England
AFAIK, all Subie MTs spec GL-5. With that said, finding a yellow-metal-safe or dual-rated GL-4/5 lube might be beneficial. Ive chosen Motul Gear 300 and Redline NS in the past.

I’d bet money that any brand of synthetic would do the job. The “best” doesn’t cost much more, though, so I totally understand wanting to go overkill. I intend to change my gear lunes once and never again. The Motul lube should not have a problem with this.


'14 Forester XT FA20DIT (Cobb Stage 1)
Edge 0W-40 + FU filter (64,774 miles)
'15 Legacy FB25 (OEM Stage, uh, neg. 7?)
Edge 0W-20 + FU filter (40,803 miles)
Re: 2015 Subaru Forester XT differential oil change [Re: jbutch] #4810497
07/10/18 04:37 PM
07/10/18 04:37 PM
Joined: Jun 2017
Posts: 74
Canada
jbutch Offline OP
jbutch  Offline OP

Joined: Jun 2017
Posts: 74
Canada
Thanks for the replies.

Does my vehicle have limited slip differentials and therefore need limited slip additives?

I tried looking online online and couldn't find this info.

Re: 2015 Subaru Forester XT differential oil change [Re: jbutch] #4810877
07/11/18 01:11 AM
07/11/18 01:11 AM
Joined: Jan 2004
Posts: 5,006
California
nthach Offline
nthach  Offline

Joined: Jan 2004
Posts: 5,006
California
Originally Posted By: jbutch


Does my vehicle have limited slip differentials and therefore need limited slip additives?

Nope - any good quality 75W-90 will work fine in your Forester. Subaru uses Torsen limited-slip diffs that don't employ wet clutches(and need the special Sturaco FM additive that the Detroit 3 and Eaton require). However, those are used in the WRX AFAIK.

I have M1 and Chevron Delo XDM between 2 Foresters. In a Ascent I might be maintaining, I plan on doing the same thing.

Last edited by nthach; 07/11/18 01:15 AM.
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