Anyone using liqui moly 75w140 diff fluid?

[Halftim3]

Not sure if it has the FM booster like the OE fluid. Anyone using it, what's your experience? Would you buy it again or go OE next time around?

[Obioban]

You need to rethink your fluid decision criteria

[Halftim3]

Is there a break in procedure for a ring and pinion swap? Wanted to use a cheaper alternative for breaking in new gears

[heinzboehmer]

Is there a break in procedure for a ring and pinion swap? Wanted to use a cheaper alternative for breaking in new gears

You only need to pay for OE once if you get it from FCP.

[oceansize]

You have to use FM so you have two choices, buy oe or take your chances by mixing your own FM into a cheaper fluid. Nobody knows the exact ratio. Most seem most go with 1 to 2 ounces per 1.5 liters

[Arith2]

I have LM from a while ago. I need to change it soon since it's been almost two years. It groans when cold and turning but that's about it. Once driving for a few seconds, no more groaning. This is normal for LSD's anyways. Once I drain it, I'll give an update. It comes with friction modifier in it already so you don't need to add any. It's the cheap route and I'm in the process of ridding my car of LM. That's the last thing. Once it's time, I'm going OE. What's strange is LM is a company that pushes all these additives, but makes their diff oil ready to go. I'm skeptical so even with no issues, I'll be changing it. I have about 7k miles on this oil.

[SteelGreyM]

Just buy the OEM. Yes it’s a little pricier. But it’s got BMWs magic formula in there and it just works. Im pretty sure not having FM in there will ruin your LSD and when that happens you’re gonna kick yourself for trying to save a couple bucks.

[Obioban]

Is there a break in procedure for a ring and pinion swap? Wanted to use a cheaper alternative for breaking in new gears

As above— buy it from fcp and swap for free after break in.