BMW Hypoid Axle Oil G4 Equivalent?

[afree]

The Supra manual says to use this in the rear diff (G3 for non-LSD, G4 for LSD. I thought they were all LSDs in the Supra?). Is there an alternative? The relabeled stuff you get from Toyota is just the BMW bottle with a 75W-80 GL-5 sticker over the BMW G4 label. This stuff goes anywhere from $50-$70 a pint!

I was thinking of using Redline 75W-90 or Motul 90 PA. Any of these good?

"Toyota" bottle:

 

[Marcozi]

Go to the Redline website and find what the company recommends for your car. Redline makes great products.

 

[jeepman3071]

I use Redline in my differential.

 

[Jimmy_Russells]

There are a fair amount of 75w80 GL4 oils on the market

 

[drtyler]

There are a fair amount of 75w80 GL4 oils on the market

Don’t think it is GL-4 oil. Bottle shown has GL-5.

 

[afree]

Don’t think it is GL-4 oil. Bottle shown has GL-5.

That is my confusion. Does G4=GL-5 or GL-4 (or both)? Is BMW's G rating not equivalent to the API rating? Motul 90 PA is good for both GLs.

 

[BMW Dom]

I think you're confusing G4 with GL-4

Another vote for the Redline, all though Valvoline 75w-90 might be a good pick, too

 

[tvaughn]

Confusing wording, but for the LSD version that's a GL5 75w80 which Motul makes, $15 per liter here: https://www.bimmerworld.com/Fluids/...d-BMW-E9X-M3-MTF-LT-2-Transmission-Fluid.html

Also interesting is that in my car (M2) it specs a GL5 75w140 instead of an 80/90 weight.

 

[4WD]

Don’t think it is GL-4 oil. Bottle shown has GL-5.

Yeah - and so is Delvac 1 - what the Porsche guys like ...

 

[D0nat]

Redline official site recommends 75w85 LSD oil for this differential.

 

[chris719]

Confusing wording, but for the LSD version that's a GL5 75w80 which Motul makes, $15 per liter here: https://www.bimmerworld.com/Fluids/...d-BMW-E9X-M3-MTF-LT-2-Transmission-Fluid.html

Also interesting is that in my car (M2) it specs a GL5 75w140 instead of an 80/90 weight.

M active differentials F8x and later use BMW (Shell?) MSP/A (EU) or Castrol SAF-XJ without FM (US). 75w-140.