Does anyone know whats the difference between the 75/90 gear lube and the 75/90 LS.
I was in a local auto zone and all I could find in the mobil 1 gear lube was the 75/90 LS. Would the 75/90 LS be ok in my 09 heritage.

 

Thats what I run..LS...stands for limited slip

 

All Mobil1 75w90 carries the LS designation because it has the limited slip additive. It will be fine for your trans.

 

Not all of the Mobil 1 75W90 Gear Lube 'bottles' carry the "LS" label on the container, but it is the same stuff.

The label was changed to add the "LS" designation to prevent confusion.

Here is a FAQ from the Mobil 1 webpage;


Question:

Please Clarify if Mobil 1 Synthetic Gear Lube LS 75W-90 is a 'Limited Slip" Product?
I just purchased your Mobil 1 75W-90 differential oil from Auto Zone. It mentions on the back that it's suitable for "limited slip" type differentials, however it is not very clear on whether a LS additive is required. So, I visited your website which advertises LS 75W-90. There is no "LS" on the product I bought. IF this is the same oil can you please ensure the bottle is labeled properly? I recently bought a 4x4 with limited slip and want to ensure I do not damage the vehicle. BTW, I'm a hard core Mobil 1 fan, having used your various products for the last 8 years. I'm switching this new SUV over to Mobil synthetics.
-- David Dent, Terrell, NC

Answer:
We recognized that this was a potential issue. As a result, we have recently changed the label to adequately convey the limited slip feature of Mobil 1 Synthetic Gear Lube LS 75W-90.

 

That clears up my question! Thanks for your help and I will go ahead with the Mobil 75/90 LS for my trans.