differential oil

tonysingh42 · 05-10-2012, 11:42 AM

Guys i was wondering if i put a higher viscosity oil in the diff rather than the 75w-90. I was going to go with 75w- 140 any harm in doing so?

gatoman39 · 05-10-2012, 02:05 PM

75w-90 is the correct viscosity, use it. Any harm in using a different viscosity than the one intended for your diff? Mechanically, probably not, but you may hear noise, feel slippage, etc, etc. Then you have to go back and dump out the oil you bought and start over again. Then you will feel, well, you know...

05-10-2012, 11:42 AM	#1
tonysingh42 New Member 0 Rep 5 Posts Drives: 2007 bmw 335i Join Date: Apr 2012 Location: valley iTrader: (0)	differential oil Guys i was wondering if i put a higher viscosity oil in the diff rather than the 75w-90. I was going to go with 75w- 140 any harm in doing so?
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05-10-2012, 02:05 PM	#2
gatoman39 Major 116 Rep 1,346 Posts Drives: 2011 E92 335 M-Sport Join Date: Feb 2010 Location: LA iTrader: (0) Garage List 2011 E92 335i M Sport [1.00]	75w-90 is the correct viscosity, use it. Any harm in using a different viscosity than the one intended for your diff? Mechanically, probably not, but you may hear noise, feel slippage, etc, etc. Then you have to go back and dump out the oil you bought and start over again. Then you will feel, well, you know... __________________
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