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Mechanical Maintenance (Oil, Fluids, Break-In, Servicing) Everything related to the mechanical maintenance of the FR-S and BRZ


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Old 07-06-2023, 02:29 AM   #1
ruturaj001
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Redline MT gear oil options

75W90 has been extensively used on 1st gen, while 2nd gen, with minor difference in transmission, as per the manual, requires MT-LV (75W) oil. I looked at all the options redline offers and decided to make a list with relevant numbers

Vis @ 100°C, CSt Vis @ 40°C, CSt
MT-LV 70W/75W 6.5 29.8
MTL 75W80 10.4 50.8
MT-85 75W85 12 62
MT-90 75W90 15.5 82

I am on stock fluid, I assume it's 75W only. I am planning to try 75W80 next time then keep going to next one at every change till I find it's not to my liking or I am on MT-90. 75W80 seems like significant improvement over 75W, just looking at numbers.
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Old 07-11-2023, 10:37 PM   #2
ruturaj001
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Update: Ended up ordering Redline MTL from CSG. I am planning to use it for a year and then get UOA. The try higher viscosity based on that. For diff I went with Motul 300 LS.
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CSG Mike (07-12-2023)
Old 07-12-2023, 10:46 PM   #3
ruturaj001
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@CSG Mike, I went by your recommendation in old comments for diff fluid. MTL being listed on CSG convinced me enough to try it but would like to hear what are your thoughts on all MTF fluid viscosities and who would those be good for?

Edit 1: Also MOTUL GEAR POWER 75W-80 seems to be new. Are you guys planning to stock it as well?

Edit 2: Seems like it's not for US yet https://new.motul.com/en-FR/products...R+POWER+75W-80

Last edited by ruturaj001; 07-13-2023 at 01:22 AM.
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