You want to prep your car for the harshest condition it will ever be exposed to. Doing it once is just as hard on the car as doing it 20 times.

The only way to really know is to do a used oil analysis on your current oil.

I know this is an old thread, but I've been trying to figure out whether to use Motul LS in the diff. You say "we like the lockup characteristic better". How is it different from using the non-LS lube? Is TBR affected? If so, in which direction?

Thanks for any clarifications...
Dirk

The actual viscosity of the fluid is different. The LS is not necessary at all, but if you don't mind experimenting, its only a few bucks.

For that matter I prefer Gear Comp in the differential over Gear300LS, but that's another ~5 bucks or so per liter.

I very much appreciate your prompt response, Mike; thanks!

However, that didn't answer my question: What is the difference in diff behaviour between LS vs non-LS? (I like how the diff behaves with the stock fluid and would prefer that this not be altered significantly.)

Cheers!
Dirk

The Torsen hangs on just a hair longer before it "gives up" and lets the inside wheel spin on hard cornering. Yes, the torsen is mechanical, but changing the fluid does make a difference.

There's the answer I was looking for. LS it is... Thanks, Mike!

Cheers!
Dirk