80w90 oil after service?

[yzyysy]

Hey all,
just recently took my 2013 86 for servicing and realized they used 80w90 transmission oil instead of the 75w90 which is stated in the owners manual. Have been doing a lot of reading and it seems that 75w90 should be used for this vehicle. Should I be worried about this? Or should I call them and request for them to use the correct oil.

[spcmafia]

Originally Posted by yzyysy

Hey all,
just recently took my 2013 86 for servicing and realized they used 80w90 transmission oil instead of the 75w90 which is stated in the owners manual. Have been doing a lot of reading and it seems that 75w90 should be used for this vehicle. Should I be worried about this? Or should I call them and request for them to use the correct oil.

You're fine. Minimum Spec is GL-3, and genuine Subaru LSD (80W90) oil is rated at GL-5. Will not be an issue.

[yzyysy]

Originally Posted by spcmafia

You're fine. Minimum Spec is GL-3, and genuine Subaru LSD (80W90) oil is rated at GL-5. Will not be an issue.

Interesting. Not saying I know any better than Toyota mechanics, but isn't 80w90 non synthetic (with synthetic oils offering better performance and longevity.)
I couldnt find much information of 80w90 used in 86/BRZs so I got a bit worried considering the owners manual itself says 75w90 spec viscosity, unless the difference between 75 and 80 is minimal?

[spcmafia]

Originally Posted by yzyysy

Interesting. Not saying I know any better than Toyota mechanics, but isn't 80w90 non synthetic (with synthetic oils offering better performance and longevity.)
I couldnt find much information of 80w90 used in 86/BRZs so I got a bit worried considering the owners manual itself says 75w90 spec.

Here is a thread that discusses the use of GL-5 fluids. It may help.


https://www.ft86club.com/forums/show...=127005&page=2


Subaru will provide their GL-5 regardless of year.

[yzyysy]

Originally Posted by spcmafia

Here is a thread that discusses the use of GL-5 fluids. It may help.


https://www.ft86club.com/forums/show...=127005&page=2


Subaru will provide their GL-5 regardless of year.

Thanks for that, was a good read
So in terms of the actual viscosity rating (GL rating aside) there isn't anything to worry about?

[spcmafia]

Originally Posted by yzyysy

Thanks for that, was a good read
So in terms of the actual viscosity rating (GL rating aside) there isn't anything to worry about?

Is not something that will make or break your components, Im sure someone will come and chime in and quote the manual, and others will say how GL-3 is the right one, others how GL-4 is about the same. But if you're really worried about it, you can talk to the technician so he can give you more insight on why they chose that viscosity.



The only thing might be that it will take longer to get up to temp, so if you're in an area that gets really cold, might want to sit on the car a little longer in the mornings before driving.

[yzyysy]

Originally Posted by spcmafia

Is not something that will make or break your components, Im sure someone will come and chime in and quote the manual, and others will say how GL-3 is the right one, others how GL-4 is about the same. But if you're really worried about it, you can talk to the technician so he can give you more insight on why they chose that viscosity.



The only thing might be that it will take longer to get up to temp, so if you're in an area that gets really cold, might want to sit on the car a little longer in the mornings before driving.

Yeah, will probably give them a call tomorrow to see what the rationale behind it was. Thanks again, youve given me a bit of peace of mind for now

[Ultramaroon]

Originally Posted by yzyysy

Yeah, will probably give them a call tomorrow to see what the rationale behind it was. Thanks again, youve given me a bit of peace of mind for now

If shifting is not too stiff for your taste, leave it. Transmission will run more quietly. It's why the factory used thick old-school fluid. The forum is littered with complaints of noisy transmissions after swapping fluids in search of easier shifts. It's a trade-off.


I personally stay away from the multi-rated gl4/5 stuff.