Subaru Extra MT Alternatives?

[Pablo]

My 23’ WRX manual says to use Subaru Extra MT but 75W-90 is ok, but “4: You may use this type of manual transmission oil. However, using this type of oil will detract from driveability and fuel efficiency.”

Does a good 90 weight such as Amsoil Severe Gear 75W-90 make the shifting feel worse?

Worse? No. Different transmission, but used it in my 2014 WRX. The only caution no matter which fluid it should be changed fairly regularly in that shared gearbox.

 

[Roberts9156]

Worse? No. Different transmission, but used it in my 2014 WRX. The only caution no matter which fluid it should be changed fairly regularly in that shared gearbox.

Thanks! It looks like Amsoil actually makes a 75W-85 grade too, which is a little closer. Which would you recommend? I don’t care about fuel efficiency, I just don’t want to change shift quality feel.

 

[Pablo]

Thanks! It looks like Amsoil actually makes a 75W-85 grade too, which is a little closer. Which would you recommend? I don’t care about fuel efficiency, I just don’t want to change shift quality feel.

That depends where you live, your climate frankly. If you live in a hot place, I would go 75W-110.

 

[Roberts9156]

So I’ve been researching Subaru WRX MT options, and get a little overwhelmed with things like yellow metal risks for GL-5 in MTs. I don’t care about fuel economy or cost much. I do care about wear and good shift quality in all climates.

I and am debating between:
1. Just paying a service center to do Extra MT (75W-80) - annoyed they don’t sell anything but drums
2. Motul Motylgear 75W-80 - seems like it’s regarded the most similar to Extra MT available, but I’m not convinced it’s any better than Extra MT
3. Motul Gear 300 75W-90 - seems like it would be better for wear, but some impact on shift quality, true?

I’m leaning towards #1, but would appreciate any advice.

Planning on AMSOIL Severe Gear 75W-90 for the rear diff.

 

[The Critic]

So I’ve been researching Subaru WRX MT options, and get a little overwhelmed with things like yellow metal risks for GL-5 in MTs. I don’t care about fuel economy or cost much. I do care about wear and good shift quality in all climates.

I and am debating between:
1. Just paying a service center to do Extra MT (75W-80) - annoyed they don’t sell anything but drums
2. Motul Motylgear 75W-80 - seems like it’s regarded the most similar to Extra MT available, but I’m not convinced it’s any better than Extra MT
3. Motul Gear 300 75W-90 - seems like it would be better for wear, but some impact on shift quality, true?

I’m leaning towards #1, but would appreciate any advice.

Planning on AMSOIL Severe Gear 75W-90 for the rear diff.

Local dealer just uses the approved alternative, which is Subaru High Performance 75W90.