F-Type ( X152 ) 2014 - Onwards
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Ugly differential oil sludge at 40K miles

  #21  
Old 03-17-2020 | 11:23 AM
Therock88's Avatar
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Originally Posted by rbsj
The posts here got me duly concerned so I had my diff oil changed this morning by my local shop (they charged me $112 so it wasn't worth my time). Ran the car on the highway for about an hour ahead of time at 80 mph to get the diff oil hot before changing. At 33K miles no leaks on the diff, oil that was changed out looked like fairly typical diff gear oil to me, not sludge like. Upon pumping in the Motul 300 specified earlier in this thread and getting the car back on the road at 80 mph the rear seemed to have a little bit less hum (now that's scientific isn't it). Certainly not hugely noticeable, but good peace of mind. Thanks to all for posting on this.
Good to hear. I have ordered the Motul 300 LS for the rear, and the SAF-XO SAE 75W-90 - 07 51 2 293 972 (same as BMW BTW) for the front, and will likely get them changed by this weekend. Not expecting any magic either, just a good maintenance practice to potentially avoid wear related issues later, and peace of mind that I actually know there is new, clean lubricants in there!

DC
 
  #22  
Old 03-18-2020 | 05:05 PM
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I replaced mines with redline.
 
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