Here is some anecdotal info FWIW. When I ran LE1605 it gave me 1/2 the wear numbers compared to Amsoil 75w140 and I ran the LE1605 for an interval that was twice as long as the Amsoil OCI. At an SAE110 the LE1605 appeared to me thicker than the Amsoil 75w140 at room temperatures, and just felt super sticky whenever I spilled some of it. Apparently it is an industrial lubricant that people use for automotive purposes, it has some additives to give it that sticky property. In cooler temps you need to warm up the bottle to help it pour/pump out , it was that thick. The cold temp flow spec wasn't that great so I would not run it in winter (IMO). To me it was a great fluid that performed well in my UOA's, but I would not shy away from the Amsoil 75w110 or 75w140, or the Mobil1 fluids others have mentioned.

 

I have an LS type 85W90 oil ready to go. Liqui Moly mineral type.

 

You did not offend me so don't worry

 

I've sent an email to Torsen.com trademark holders of the torsen diff about preferred fluid. I got quite a surprising answer.

"The short answer is it doesn't make much difference to the differential."

Full answer:

"With regards to you lubrication question - the short answer is it doesn't make much difference to the differential. Ultimately, it’s a question for the axle manufacturer. What I mean is, the differential operates as just one component in a larger system, a system that shares lubricant. The axle assembly that contains the differential also contains other significant components to which proper lubrication is equally (or more) important. Helical gear differentials like the Torsen that came in your car can actually operate in wide range of fluids and are not particularly fussy about it, so long as the lubricant is of a good quality. They will operate just fine in all of the oil weights that you've mentioned. On the other hand, the ring gear and the pinion gear that drives it are extremely fussy about correct lubrication. So are the bearings and oil seals, though most people don't consider them.

A lot of people ask the same basic question - what lube does the Torsen need? Basically, I have to point out that this is not the correct question to ask, for the reasons mentioned before. What you need to ask is "what oil does my ring & pinion gearing need?" That is what you should be concerned with, as the differential itself doesn't really care. You'll need to ask the gear manufacturer that. If you are using the production ring & pinion gears, that information should be included in your owner's manual, or available from the dealer."

 

Thanks, for posting this!

 

you're welcome

 

Yes thank you!

 

i have used many different fluids in the past including 75w90 mobil 1, amsoil 75w140 and LE1605.. granted i dont track my car its only street driven after having blackstone labs do a UOA le1605 came back with the lowest wear metals.

there is also someone on here that has tested different fluids as well and have noted le1605 showed cooler differential temperatures as well compared to others. run whatever your heart desires,

 

All that data is with the "old" LE-1605, not the current lubricant which is no longer marketed as meeting GL-5 standards. This change occurred recently. New bottles and all. If you get a test of the current lubricant please share it.

I'm still on the fence but have several more months before a change is scheduled.

-- Chuck

 

Has anyone here run Motul diff fluid before?