Ah thanks. Of course I will stick to Motul 300, as it is manufacturer recommended, for my wavetrac. That said, I don’t track my cars, so my use case is much milder than yours!
I am a shareholder of Lubrizol!
. Actually anyone with Berkshire shares is a Lubrizol shareholder as they are fully owned by Berkshire. NOW I know what Lubrizol does! Thanks!! 
Just FYI btw - not to be excessively pendantic, but my reason for bringing up the G50 transmission is because the G50 in an aircooled 911 is a transaxle setup where the differential and the transmission share the same oil. To that end, Redline 75W-90NS has worked well for my 911 transaxle, which also happens to have a Torque Biasing Differential in it. My 911’s TBD was made by Guard Transmission (not wavetrac) so that’s not exactly the same thing, but I wanted to just explain why it was kind of relevant. Ok carry on…..
I still fell the g50 comment is irrelevant.
I forgot to ask: What Castrol did you use, and how many consecutive laps on the Castrol?
I used Castrol SAF-XO one of the bmw guys had 2L at the track.I forgot to ask: What Castrol did you use, and how many consecutive laps on the Castrol?
Also, was the boil-over symptom leaking out the vent on top of the diff?
Do we know is this confirmed these Wavetrac's for E500Es are going to go NLA? Or might they produce more in the future? I have one on the shelf already but just wondering what the future holds for these!
I'd be surprised if it's a permanent NLA. Wavetrac has always (AFAIK) required a minimum order of 25-30 units to build a batch of any given differential, which is a $25k+ out of pocket expense for a dealer. Might be tough to find a dealer willing to fork out that much without a number of deposits though, there probably isn't a ton of demand for this unit. (?)
That make sense, but I did not suggest Redline 75W90NS. I typed, verbatim, “How about Redline 75W90NS?” That was a perfectly reasonable segway into relating my experience with the product in a G50 transaxle. The product might be unsuitable for a wavetrac (after further discussion) but that doesn‘t make asking the question and relating an experience irrelevant.
They will go NLA pending stock order of 30+ diffs. The 210mm Diff shares a few components with a different application. The proprietary parts to the 210mm diff is the casing. Once parts are depleted Wavetrac will not be able to make the diff unless a stocking dealer like my self places a 30pc order.
You are correct on this.
horse is dead, beat and tired.
Yes Motul will always supply the product its just a slow down in production and supply chain.
Yes - just be careful, as most gear oils have friction modifiers, and the Wavetrac will work best with zero friction modifers. Read the spec sheets carefully.
