Gear oil for OS Giken LSD? - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

GrabTheWheel · 09-24-2019, 05:43 PM

Is there any other gear oil I can use besides the way overpriced OS Giken fluid? It's starting to make me wish I had gone with Cusco or something else despite enjoying the performance of their LSD.

GrabTheWheel · 09-24-2019, 05:49 PM

This is the best price I could find. Anybody order from these guys before?

https://www.nengun.com/os-giken/os-2...CABEgIhz_D_BwE

DarkPira7e · 09-24-2019, 05:55 PM

The recommendation is because they want it to operate how they designed it. If you put in thinner fluid it'll be really harsh and noisy.

Sometimes the games you play at the carnival are more expensive than admission you paid to get in.

prandelia · 09-24-2019, 06:54 PM

You def. want to use their oil, or else you'll wear it out prematurely. I have a bigger rear diff cover, so now I have to use almost 2 qt. of Giken juice. OUCH.

That said, I've been wondering about this Redline 80W250 and if it's suitable. We enduro race our Miata's with Gikens too, and would be nice to use a cheaper oil. Maybe I'll send a tech request to Redline.

https://www.redlineoil.com/80w250-gl-5-gear-oil-2

GrabTheWheel · 09-25-2019, 12:22 AM

Quote:

Originally Posted by prandelia

You def. want to use their oil, or else you'll wear it out prematurely. I have a bigger rear diff cover, so now I have to use almost 2 qt. of Giken juice. OUCH.

That said, I've been wondering about this Redline 80W250 and if it's suitable. We enduro race our Miata's with Gikens too, and would be nice to use a cheaper oil. Maybe I'll send a tech request to Redline.

https://www.redlineoil.com/80w250-gl-5-gear-oil-2

Thanks. Please let me know if you try it. Yes, if I went to a different oil was definitely still going to use the same weight.

ZDan · 09-25-2019, 07:09 AM

OSGiken fluid is worth it just for the smell! Bouquet is like some kinda badass grapeffuit IPA... They also have qualified a Motul gear oil for their LSD, that's the only other option id consider.

prandelia · 09-25-2019, 08:53 AM

Quote:

Originally Posted by ZDan

OSGiken fluid is worth it just for the smell! Bouquet is like some kinda badass grapeffuit IPA... They also have qualified a Motul gear oil for their LSD, that's the only other option id consider.

yes, its Gear 300 75W140, but really only for transaxle gearboxes, such as Porsche. I know, because I run a Giken in my 987 track car, and after about 4 years, I finally need a rebuild. I feel like it's too thin for the LSD, but about as thick as you can run for the gearbox. It's definitely a compromise when you have a transaxle.

pcs · 10-03-2019, 08:28 PM

they ship with a list of "approved" alternative fluids, at least they do now. While they'll work, I've been told that you'll end up with a lot more chatter and noise. Try something from the list and see how it goes. (almost) worst case scenario you end back using the OSG fluid.

09-24-2019, 05:43 PM	#1
GrabTheWheel Senior Member Join Date: Feb 2018 Drives: 16' BRZ Location: California Posts: 362 Thanks: 76 Thanked 161 Times in 91 Posts Mentioned: 2 Post(s) Tagged: 0 Thread(s)	Gear oil for OS Giken LSD? Is there any other gear oil I can use besides the way overpriced OS Giken fluid? It's starting to make me wish I had gone with Cusco or something else despite enjoying the performance of their LSD.

09-24-2019, 06:54 PM	#4
prandelia Senior Member Join Date: Sep 2019 Drives: 2015 FRS Location: KY Posts: 177 Thanks: 1 Thanked 191 Times in 78 Posts Mentioned: 5 Post(s) Tagged: 0 Thread(s)	You def. want to use their oil, or else you'll wear it out prematurely. I have a bigger rear diff cover, so now I have to use almost 2 qt. of Giken juice. OUCH. That said, I've been wondering about this Redline 80W250 and if it's suitable. We enduro race our Miata's with Gikens too, and would be nice to use a cheaper oil. Maybe I'll send a tech request to Redline. https://www.redlineoil.com/80w250-gl-5-gear-oil-2 __________________ '15 FRS - GLTC spec YouTube channel race vids: https://www.youtube.com/channel/UClU...phsppnA/videos

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09-24-2019, 05:49 PM	#2
GrabTheWheel Senior Member Join Date: Feb 2018 Drives: 16' BRZ Location: California Posts: 362 Thanks: 76 Thanked 161 Times in 91 Posts Mentioned: 2 Post(s) Tagged: 0 Thread(s)	This is the best price I could find. Anybody order from these guys before? https://www.nengun.com/os-giken/os-2...CABEgIhz_D_BwE

09-24-2019, 05:55 PM	#3
DarkPira7e Rust bucket enthusiast Join Date: Feb 2017 Drives: 2013 Turbo Firestorm FRS Location: Vermont Posts: 3,933 Thanks: 3,200 Thanked 4,095 Times in 2,045 Posts Mentioned: 31 Post(s) Tagged: 0 Thread(s)	The recommendation is because they want it to operate how they designed it. If you put in thinner fluid it'll be really harsh and noisy. Sometimes the games you play at the carnival are more expensive than admission you paid to get in.

09-25-2019, 07:09 AM	#6
ZDan Senior Member Join Date: May 2011 Drives: '23 BRZ Location: Providence, RI Posts: 4,584 Thanks: 1,377 Thanked 3,891 Times in 2,032 Posts Mentioned: 85 Post(s) Tagged: 0 Thread(s)	OSGiken fluid is worth it just for the smell! Bouquet is like some kinda badass grapeffuit IPA... They also have qualified a Motul gear oil for their LSD, that's the only other option id consider.

10-03-2019, 08:28 PM	#8
pcs Member Join Date: May 2018 Drives: BRZ Location: Los Angeles Posts: 35 Thanks: 0 Thanked 12 Times in 10 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	they ship with a list of "approved" alternative fluids, at least they do now. While they'll work, I've been told that you'll end up with a lot more chatter and noise. Try something from the list and see how it goes. (almost) worst case scenario you end back using the OSG fluid.

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