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Re: 2019 Subaru Impreza front and rear diff oil [Re: FA_WRX] #5137894 06/18/19 08:45 PM
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xtell Offline OP
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Originally Posted by FA_WRX
curious as to why you would change the OEM fluid so early. I've been doing mine at about 30K intervals. Used OEM fluid no issues.


The vehicle just went over 5,000+ miles. You are correct, I am changing it early but on all of my other vehicles, I've been an "early changer" of factory fluids.

Re: 2019 Subaru Impreza front and rear diff oil [Re: gathermewool] #5137902 06/18/19 08:54 PM
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xtell Offline OP
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Originally Posted by gathermewool
I'm all for going for the best when it comes to some fluids, but only if there's a reason. For instance, I plan to dump the factory fill and add Motul Gear 300 in both my Forester XT and Legacy, then not change the lube again for a LONG time, if ever again.

Dumping expensive (~$20/L) lube often seems pretty foolish in such LIGHT, LIGHT, LIGHT duty applications. Might as well just use ST, if you want to drain it every 30k miles.

Originally Posted by Eddie
Hmm. said vehicle is a new 2019 and you don't want to use the factory approved gear lube. Do you have a legitimate reason to dump the warranty if you have gear problems? Ed


What in the world would make you think the warranty will be dumped???

From the 2019 Impreza owner's manual, the only requirement is that the gear oil have an API classification GL-5 (75W-90)
-----90 is also allowed above freezing (i.e., N/A for the vast majority of Subaru owners)



[Linked Image]


I always make sure I save my receipts and mark down mileage, date of service (what I do or what a repair shop does) and what exactly was done. Several times I have taken one of my vehicles in for dealer service under warranty and every time I've gone and showed my service records if the service related to a warranty claim. My information has been accepted as valid and the warranty work was carried out without issue.

Re: 2019 Subaru Impreza front and rear diff oil [Re: xtell] #5138183 06/19/19 07:35 AM
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izualangel Offline
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I changed my front diff/trans fluid when the CV shaft needed replacement. After talking with the parts guys at my dealer, I decided to use what they use. The plain old valvoline dino 75w90. Same in the rear diff. Been in there 6 years, and it still looks good when I check it. It's been about 55,000 miles. I have thought about changing ut, but I'll probably wait for a CV shaft to poop out first.


2006 Subaru Outback 2.5i - Mobil 1 5w-30 HM with WIX 57712
2019 KIA Forte 2.0L - factory fill
Re: 2019 Subaru Impreza front and rear diff oil [Re: xtell] #5138250 06/19/19 08:38 AM
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gathermewool Offline
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Originally Posted by xtell
Originally Posted by gathermewool
I'm all for going for the best when it comes to some fluids, but only if there's a reason. For instance, I plan to dump the factory fill and add Motul Gear 300 in both my Forester XT and Legacy, then not change the lube again for a LONG time, if ever again.

Dumping expensive (~$20/L) lube often seems pretty foolish in such LIGHT, LIGHT, LIGHT duty applications. Might as well just use ST, if you want to drain it every 30k miles.

Originally Posted by Eddie
Hmm. said vehicle is a new 2019 and you don't want to use the factory approved gear lube. Do you have a legitimate reason to dump the warranty if you have gear problems? Ed


What in the world would make you think the warranty will be dumped???

From the 2019 Impreza owner's manual, the only requirement is that the gear oil have an API classification GL-5 (75W-90)
-----90 is also allowed above freezing (i.e., N/A for the vast majority of Subaru owners)



I always make sure I save my receipts and mark down mileage, date of service (what I do or what a repair shop does) and what exactly was done. Several times I have taken one of my vehicles in for dealer service under warranty and every time I've gone and showed my service records if the service related to a warranty claim. My information has been accepted as valid and the warranty work was carried out without issue.


I don't know if you thought I was questioning your wanting to DIY or if you responded to the wrong person.

I 100% on board with you and agree that anyone can DIY (with the correctly spec'd fluids) and the dealer can not ever deny a warranty claim, unless they prove that you screwed it up. I do all of my own fluid changes, EXCEPT for the CVT, since it's still under the extended 100k-miles warranty.

With that said, you obviously have to be careful. For instance, if you go in for warranty service on your grinding rear diff and they discover the level is not corrected and there are no discernible leaks from the case, the dealer would have a good chance of denying your differential warranty work approval and you'd be on the hook for the whole thing.


14 Forester XT Touring FA20DIT (Cobb Stage 1)
Castrol Magnatec 5W-30 D1G2 + FU filter (2nd OFI) (77,760mi, 3/7/20)
15 Legacy Premium FB25
Magnatec 0W-20 D1G2+ FU filter (2nd OFI) (54,621mi, 3/4/20)
Re: 2019 Subaru Impreza front and rear diff oil [Re: gathermewool] #5139669 06/20/19 09:43 PM
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xtell Offline OP
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gathermewool,

Absolutely no issue at all. I was just stating that I've been fortunate enough to have warranty work done and my receipts/records have always been accepted. Several of my relatives went to dealerships for warranty work and they also had receipts/records of work they did themselves on their vehicles and the Dealerships would not do the warranty work because the previous repairs / service (like transmission fluid changes) were not done by a Dealership or Certified Mechanic. Your example of having low fluid level giving the Dealership reason to deny a warranty claim is a very valid point.

Re: 2019 Subaru Impreza front and rear diff oil [Re: xtell] #5141570 06/23/19 09:57 AM
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gathermewool Offline
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Originally Posted by xtell
gathermewool,

Absolutely no issue at all. I was just stating that I've been fortunate enough to have warranty work done and my receipts/records have always been accepted. Several of my relatives went to dealerships for warranty work and they also had receipts/records of work they did themselves on their vehicles and the Dealerships would not do the warranty work because the previous repairs / service (like transmission fluid changes) were not done by a Dealership or Certified Mechanic. Your example of having low fluid level giving the Dealership reason to deny a warranty claim is a very valid point.



Perfect - just didn't mean to inadvertently offend you.

RE: Low level in diff cause for warranty denial: This might actually be a bad example. If you and I can change the diff fluid ourselves, we can for darned sure check the level before taking it into the dealer.

If any dealer denied warranty service, because I did work myself and had documentation to prove it, they'd better be ready to lose that fight. Again, the only reason I could see them denying a specific component for warranty repair, is if the DIYer did other work that impacted this work.

I think I've got a good example here: if you upgrade your roll bar to one that is thicker than OEM and then take your vehicle in for warranty repair of the endlinks that failed. In this case, they'd have every right to tell you to go pound sand.


14 Forester XT Touring FA20DIT (Cobb Stage 1)
Castrol Magnatec 5W-30 D1G2 + FU filter (2nd OFI) (77,760mi, 3/7/20)
15 Legacy Premium FB25
Magnatec 0W-20 D1G2+ FU filter (2nd OFI) (54,621mi, 3/4/20)
Re: 2019 Subaru Impreza front and rear diff oil [Re: xtell] #5161128 07/15/19 05:20 AM
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kr_bitog Offline
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The original viscosity for EXTRA MT is actually 75w85 GL5

Re: 2019 Subaru Impreza front and rear diff oil [Re: gathermewool] #5166032 07/20/19 06:56 AM
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PWMDMD Offline
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Originally Posted by gathermewool
Originally Posted by xtell
gathermewool,

Absolutely no issue at all. I was just stating that I've been fortunate enough to have warranty work done and my receipts/records have always been accepted. Several of my relatives went to dealerships for warranty work and they also had receipts/records of work they did themselves on their vehicles and the Dealerships would not do the warranty work because the previous repairs / service (like transmission fluid changes) were not done by a Dealership or Certified Mechanic. Your example of having low fluid level giving the Dealership reason to deny a warranty claim is a very valid point.



Perfect - just didn't mean to inadvertently offend you.

RE: Low level in diff cause for warranty denial: This might actually be a bad example. If you and I can change the diff fluid ourselves, we can for darned sure check the level before taking it into the dealer.

If any dealer denied warranty service, because I did work myself and had documentation to prove it, they'd better be ready to lose that fight. Again, the only reason I could see them denying a specific component for warranty repair, is if the DIYer did other work that impacted this work.

I think I've got a good example here: if you upgrade your roll bar to one that is thicker than OEM and then take your vehicle in for warranty repair of the endlinks that failed. In this case, they'd have every right to tell you to go pound sand.



I've never understood this attitude by dealerships and some of the reasons I've read for dealerships to deny legitimate warranty work have been ridiculous and impossible for the dealership to prove. Is the hope in denying legit warranty work that the customer will have to reimburse at a higher rate? Why do they care and why wouldn't they be on their customer's side if not just for the goodwill even if it's at al lower rate? This just seems penny wise pound foolish as it usually just results in a [censored] off customer who will no longer purchase or service vehicles at that dealership.

Last edited by PWMDMD; 07/20/19 06:58 AM.

Current: 2019 Lexus RX 350 (Mobil AFE 0W-30 and Toyota OEM Filter) and 2018 Honda Pilot Touring (PP 5W-30 and Mobil 1 EP M1-110A Filter)
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