Ravenol MTF-1 75w-85 in Subaru?

[George_Neighbros69]

Does anyone have experience with Ravenol MTF-1 75w-85 it’s a Gl-4/GL-5. Subaru calls for Subaru extra Mt for the transaxle. My understanding is that the Extra MT is a hybrid gl-4/gl-5 75w-80. From my online research the Extra Mt is slightly more focused on the transmission portion (it has a shared system same fluid for the front diff and manual transmission)

 

[RallyXaDSM]

I've used it in a different application where it worked good. It's oddly bright red like ATF. Only issue with Ravenol in the US is there's only one distributor, so pricing isn't all that competitive and shipping is expensive unless you bulk order.

Motul Gear 300 is what I'd personally run in any Subaru gearbox (and most gearboxes in general). It's also GL4/GL5 and right around the 75W85/75W90 threshold for viscosity.

 

[RooflessVW]

It's probably fine. Redline MT-85 is available at O'Reilly

 

[RallyXaDSM]

It's probably fine. Redline MT-85 is available at O'Reilly

Subaru manual gearboxes have a hypoid front diff in them which shares fluid with the rest of the gearset. They can't use a fluid that's GL4 only

 

[D60]

I thought Ravenol doesn't actually test all that well? However, I'm unable to cite said test due to CRS. Maybe I'm spreading malicious rumors?

 

[kschachn]

I thought Ravenol doesn't actually test all that well? However, I'm unable to cite said test due to CRS. Maybe I'm spreading malicious rumors?

What tests have you seen?

Without further information that is the most plausible explanation.

 

[George_Neighbros69]

I forgot to mention this is for a crosstrek with the 6 speed M/T. I know Motul 75w-90 is popular with the wrx owners. From what I can tell, both cars seem to use the same basics housing for the transaxle, but with different internals. Subaru calls for gl-5 75w-90 in the wrx. The crosstrek owners manual states that you can use a gl-5 75w-90 with a side note that it may hurt drive ability and fuel economy. That makes me think the EXTRA MT is tailored toward the transmission side of the shared system rather than just being a typical diff focus gear oil

 

[MolaKule]

..

That makes me think the EXTRA MT is tailored toward the transmission side of the shared system rather than just being a typical diff focus gear oil

The Extra MT formulation is focused on the proper friction coefficient for the transmission's synchronizer assembly, as well as the optimum gear protection chemistry for the hypoid differential, hence the GL-4/GL-5 protection rating.