Lexus GS350 Diff Service - Fluid choice?

[JeffKeryk]

Gonna service out 2013 Lexus GS350 F Sport differential soon; she is at 60K miles.
I don't know much about the Toyota spec 75w85 except it is kinda pricey...

Was considering M1 Synthetic 75w90 LS or perhaps AMSOIL.
If you have any real world experience, I would appreciate your thoughts.

Thanks in advance.
FYI, I will also service the transmission with the Idemitsu WS equivalent.

You guys ROCK!

 

[nthach]

Red Line makes a 75W-85 for Toyota applications - https://www.redlineoil.com/75w85-gl-5-gear-oil

You can use a 75W-90 I think, Toyota does use a different swill for LSD diffs, and I think F Sport cars do use a Torsen diff in the back. But I don't think Torsens are are sensitive to friction compared to a clutch-based LSD like a Posi in a GM or Dana/Eaton unit in a Ford.

 

[The Critic]

Redline 75W85 would be my choice as well. I can get you some same day if you want to meet me halfway- just let me know.

 

[StevieC]

I used Amsoil Severe Gear 75w90 in the Highlander and had no issues in the short time I owned it. I have used it in numerous other vehicles for friends/family etc. and it has performed well. It comes in nice easy squeeze bags making filling hard to get at spots a breeze.

 

[JeffKeryk]

Originally Posted by The Critic
Redline 75W85 would be my choice as well. I can get you some same day if you want to meet me halfway- just let me know.


Thanks Critic. I recently had surgery on my foot/ankle so I will be outta commission for at least another month.
I appreciate your (and others) guidance.
I see you are in CA as well; I am in Los Gatos; are you close?

Redline it is.

 

[Y_K]

RedLine or Motul 75W-85. Motul may be cheaper through Worldpac

 

[Dyusik]

Had 75w90 (amsoil of some sort, but it doesn't matter) in mine since 40K, you will not see a difference.

 

[dippschtick]

https://www.ravenol.de/en/products/usage/d/Product/show/p/ravenol-mtf-1-sae-75w-85.html

Ran this is a 2014 Tacoma, 2011 Lexus IS250, and now my 2018 4Runner. Never any issues and seems to be the real deal.

And by the way, can be had on Amazon.

Almost forgot, comes with a built in spout that makes if very easy to fill the rear differentials.

 

[PandaBear]

IS250 here, I used Redline 75w85. If I were to do it again probably just any 75w90 to save the trouble.

 

[JeffKeryk]

Bought 2 quarts of Red Line 75w85.
Will service the trans and differential soon.