BMW 1-Series Forum (F20) 135i - 1Addicts.com > Second Generation 1 Series Forum > 2012 BMW 1-Series Sporthatch (F20) Discussion > Diff oil change.
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      06-02-2022, 11:44 AM   #1
IJO
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Diff oil change.

I changed my diff oil today and so much for never needing changing..

Also replaced the 5year old AGM battery and will be doing the gearbox (manual) tomorrow.

The brake fluid will also be due.
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      12-22-2022, 02:09 AM   #2
MaxLaMenace
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Hi,

I'm going to change my diff oil and i saw your post

Wich oil did you choose for your car ? I saw that BMW specifies are a GL1 oil but i don't find the desired viscosity...

Thanks
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      12-22-2022, 11:05 AM   #3
IJO
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I used this GL5 Penrite in the diff.

https://www.amazon.co.uk/gp/product/..._title_o01_s00

Do you really want GL1? Read this:

GL1 is the lowest level of performance and is only used in vintage transmissions. It is very similar to engine oil, having a very low additive content, but is available in much higher (thicker) viscosities to suit gearboxes with unsophisticated oil seals. There are 2 products available in Millers Green Gear Oil range of GL1 oils as follows: Millers Classic Green Gear Oil 90 GL1 and Millers Classic Green Gear Oil 140 GL1.

GL5 specification is for highly loaded hypoid differentials as fitted to most cars from 1960 onwards. Millers offer the following GL5 oils: Millers Classic Differential Oil EP 90 GL5, Millers Classic Differential Oil 85w140 GL5 and Millers Limited Slip EP 90 GL5 for limited slip differentials.

https://www.millersoils.fr/en/the-va...-gl5-etc-mean/

Last edited by IJO; 12-22-2022 at 11:13 AM..
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