MT fluid change experience - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

Brzer · 11-21-2012, 03:51 PM

I know that there have been a lot of posts about MT fluids but after reading all of them as well as posts on Bobistheoilguy, I decided to go with GM part #12346190. It is a fully synthetic Gl-4 made with with PAO's and esters and no pseudo-synthetic GroupIII oil and variably described as a 75w-90 and 75w-85 with KV40 and 100 values of 75 and 11.5 cSt. In the Chevrolet 2010 vehicle product car manual it is described as a 75w-90, so no warranty issues using it. It is expensive. Retails for 26.36 a quart. I got it at dealer cost for 16.53. Shifts are now very smooth with just the right engagement feel and no second gear notchiness! Highly recommended. See link for warranty proof of Gl-4 and 75w-90. The second option is the one to download.
http://printfu.org/gm+oil+12346190

Brzer · 11-23-2012, 07:21 PM

Update after driving in weather in the 30s, mild second gear notchiness briefly. Still much better than OEM. May try Pentosin next time but not until my warranty is up. I don't want a claim denial.

gmookher · 11-23-2012, 11:29 PM

What makes you think running pentosin will be a claim denial?

Brzer · 11-24-2012, 01:06 AM

It is a 75w-80 and the manual calls for a 75w-90. I am not concerned that it wouldn't be a good choice, but if I where to have bad luck with my transmission, Subaru could use this as a way to deny warranty.

Dezoris · 11-24-2012, 01:43 AM

Given the dealer techs cant even tighten lug nuts right, last thing I would worry about is them sending trans fluid to a lab to test oil weight.

Bluetib · 12-11-2012, 11:28 AM

Pentosin MTF2 is definitely working perfectly for
my BRZ transmission, smooth like butter without
compromise.

Car is almost at 8000 clicks and temperatures since
flush 2 weeks ago are 20 to 50F.

CaptainSlow · 12-11-2012, 11:56 AM

Is this something that can be easily done by an average at-home garage tinkerer (with basic tools), or should it be done by a transmission shop? How many quarts are required? I think this will be one of the first things I do once I get my FR-S in the spring!

DarkSunrise · 12-11-2012, 12:00 PM

Looks similar to my old STI. If you can do an oil change, should be no problem.

gmookher · 12-11-2012, 12:33 PM

Quote:

Originally Posted by Bluetib

Pentosin MTF2 is definitely working perfectly for
my BRZ transmission, smooth like butter without
compromise.

Car is almost at 8000 clicks and temperatures since
flush 2 weeks ago are 20 to 50F.

Pento is superior to the GM stuff btw..you get what you pay for. DO a search there are threads on this site relating to pentosin
easy to do for home wrench, depending on your skill level, if you can change engine oil and get the car up safely you can do this too

Dave-ROR · 12-11-2012, 12:41 PM

Quote:

Originally Posted by CaptainSlow

Is this something that can be easily done by an average at-home garage tinkerer (with basic tools), or should it be done by a transmission shop? How many quarts are required? I think this will be one of the first things I do once I get my FR-S in the spring!

It's very easy.

4 jack stands, a jack, a couple of tools, crush washers (or reuse, I prefer to replace), fluid pump (unless using gear 300 in the trans), and some tools.

There's a DIY in the DIY subforum.

Dave-ROR · 12-11-2012, 12:43 PM

Quote:

Originally Posted by gmookher

Pento is superior to the GM stuff btw..you get what you pay for. DO a search there are threads on this site relating to pentosin
easy to do for home wrench, depending on your skill level, if you can change engine oil and get the car up safely you can do this too

He's using pentosin mtf2 now I believe...

1strwdcar · 12-11-2012, 12:59 PM

Quote:

Originally Posted by Dezoris

Given the dealer techs cant even tighten lug nuts right, last thing I would worry about is them sending trans fluid to a lab to test oil weight.

Truth most fluid hits the shop floor

gmookher · 12-11-2012, 01:13 PM

use a big shop type fluid syringe, its cleaner than most screw on pumps.

CaptainSlow · 12-11-2012, 01:18 PM

Where can you get one of those? I've looked for something just like that before with no luck

11-24-2012, 01:43 AM	#5
Dezoris Senior Member Join Date: Aug 2012 Drives: FR-S Location: IL Posts: 2,857 Thanks: 519 Thanked 2,998 Times in 1,095 Posts Mentioned: 159 Post(s) Tagged: 1 Thread(s)	Given the dealer techs cant even tighten lug nuts right, last thing I would worry about is them sending trans fluid to a lab to test oil weight. __________________ SAVAGEGEESE

12-11-2012, 11:56 AM	#7
CaptainSlow Senior Member Join Date: Oct 2012 Drives: 2013 Scion FR-S Location: Mid-Michigan Posts: 799 Thanks: 392 Thanked 388 Times in 180 Posts Mentioned: 2 Post(s) Tagged: 0 Thread(s)	Is this something that can be easily done by an average at-home garage tinkerer (with basic tools), or should it be done by a transmission shop? How many quarts are required? I think this will be one of the first things I do once I get my FR-S in the spring! __________________ Ultramarine 2013 Scion FR-S 6MT

12-11-2012, 01:13 PM	#13
gmookher Banned Join Date: Aug 2012 Drives: VortechSC,BorlaEL,Perrin,GCRace Location: HighHeatHighAltitudeAZ,USA Posts: 2,254 Thanks: 458 Thanked 669 Times in 394 Posts Mentioned: 9 Post(s) Tagged: 2 Thread(s)	use a big shop type fluid syringe, its cleaner than most screw on pumps. Attached Images

12-11-2012, 01:18 PM	#14
CaptainSlow Senior Member Join Date: Oct 2012 Drives: 2013 Scion FR-S Location: Mid-Michigan Posts: 799 Thanks: 392 Thanked 388 Times in 180 Posts Mentioned: 2 Post(s) Tagged: 0 Thread(s)	Where can you get one of those? I've looked for something just like that before with no luck __________________ Ultramarine 2013 Scion FR-S 6MT

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11-21-2012, 03:51 PM	#1
Brzer Member Join Date: Jan 2012 Drives: BRZ, 2011 Outback 3.6R Location: Portland, Oregon Posts: 41 Thanks: 5 Thanked 8 Times in 5 Posts Mentioned: 3 Post(s) Tagged: 0 Thread(s)	MT fluid change experience I know that there have been a lot of posts about MT fluids but after reading all of them as well as posts on Bobistheoilguy, I decided to go with GM part #12346190. It is a fully synthetic Gl-4 made with with PAO's and esters and no pseudo-synthetic GroupIII oil and variably described as a 75w-90 and 75w-85 with KV40 and 100 values of 75 and 11.5 cSt. In the Chevrolet 2010 vehicle product car manual it is described as a 75w-90, so no warranty issues using it. It is expensive. Retails for 26.36 a quart. I got it at dealer cost for 16.53. Shifts are now very smooth with just the right engagement feel and no second gear notchiness! Highly recommended. See link for warranty proof of Gl-4 and 75w-90. The second option is the one to download. http://printfu.org/gm+oil+12346190

11-23-2012, 07:21 PM	#2
Brzer Member Join Date: Jan 2012 Drives: BRZ, 2011 Outback 3.6R Location: Portland, Oregon Posts: 41 Thanks: 5 Thanked 8 Times in 5 Posts Mentioned: 3 Post(s) Tagged: 0 Thread(s)	Update after driving in weather in the 30s, mild second gear notchiness briefly. Still much better than OEM. May try Pentosin next time but not until my warranty is up. I don't want a claim denial.

11-23-2012, 11:29 PM	#3
gmookher Banned Join Date: Aug 2012 Drives: VortechSC,BorlaEL,Perrin,GCRace Location: HighHeatHighAltitudeAZ,USA Posts: 2,254 Thanks: 458 Thanked 669 Times in 394 Posts Mentioned: 9 Post(s) Tagged: 2 Thread(s)	What makes you think running pentosin will be a claim denial?

11-24-2012, 01:06 AM	#4
Brzer Member Join Date: Jan 2012 Drives: BRZ, 2011 Outback 3.6R Location: Portland, Oregon Posts: 41 Thanks: 5 Thanked 8 Times in 5 Posts Mentioned: 3 Post(s) Tagged: 0 Thread(s)	It is a 75w-80 and the manual calls for a 75w-90. I am not concerned that it wouldn't be a good choice, but if I where to have bad luck with my transmission, Subaru could use this as a way to deny warranty.

12-11-2012, 11:28 AM	#6
Bluetib Subaru product specialist Join Date: Oct 2012 Drives: BRZ Sportech Location: Montreal Posts: 12 Thanks: 0 Thanked 9 Times in 6 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	Pentosin MTF2 is definitely working perfectly for my BRZ transmission, smooth like butter without compromise. Car is almost at 8000 clicks and temperatures since flush 2 weeks ago are 20 to 50F.

12-11-2012, 12:00 PM	#8
DarkSunrise Senior Member Join Date: Apr 2012 Drives: 22 BRZ (Previously 13 FR-S) Location: USA Posts: 5,798 Thanks: 2,187 Thanked 4,243 Times in 2,221 Posts Mentioned: 48 Post(s) Tagged: 2 Thread(s)	Looks similar to my old STI. If you can do an oil change, should be no problem.

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