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Ask Mobil Archive -
Gear Oils
DateQuestionAnswer
09/23/2009
Gear Lube Effect on Transmission Brass Components
In regard to the Mobil 1 Synthetic Gear Lube LS 75W-90 Gl-5 LS gear oil. Does the statement "Excellent rust, staining and corrosion protection of copper and its alloys" mean that the additives in the ...
Nissan recommends a GL-4 type gear lubricant for your Pathfinder. Mobil 1 Synthetic Gear Lube is an API GL-5 gear oil and would not be recommended for your manual transmission. 
07/06/2009
Will Gear Lube Viscosity Difference Cause Problems?
My vehicle is a 1997 Toyota Supra non-turbo and the replacement for differential oil says that I need Hypoid GL-5 SAE 90 gear oil for temperature above 18°F or 0°C. It says that GL-5 80W-90 is ok but ...
The sales person made a great recommendation.  Mobil 1 Synthetic Gear Lube LS 75W-90 is an excellent choice. It will still provide the right operating viscometrics since it is an SAE 90 grade at tempe...
05/05/2009
Any Compatibility Concerns with the Plastics Used in Bearing Cages/Spacers?
I have read on club/owner sites not to use Mobil 1 gear oil in Moto Guzzi transmissions or BMW final drives because some of the plastics used in bearing cages/spacers are not compatible with the oil. ...
We checked with our EURO car experts and they say what you've read is not accurate. Mobil 1 gear oils are premium products that will work well in your tranny. The lube recommendation for the final dri...
02/18/2009
Which Gear Oil Brand is Best for Porsches with Limited Slip Transaxles?
For Porsches with limited slip transaxles, I've heard that Mobil 1 Synthetic Gear Lube LS 75W-90 is too slippery for the synchros and that Mobil Delvac Synthetic Gear Oil 75W-90 is the preferred lube....
Mobil 1 Synthetic Gear Lube LS is specifically designed for limited slip differentials. It contains a nominal amount of friction modifier to satisfy the needs of many applications. Mobil Delvac Synthe...
05/21/2008
Has Mobil 1 Synthetic Gear Lube LS 75W-90 Changed?
Has Mobil 1 Synthetic Gear Lube LS 75W-90 changed? I've used Mobil 1 Synthetic Gear Lube in my Formula Continental Hewland LD200 racing transaxle for years. Whenever we need to change gears, the old l...
We have not made any changes to the formulation. If you have an oil sample from your next drain we may be able to analyze it and find out what you are seeing. It could be due to a change in a new gear...
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