Rear differential green gear oil WTF??

So my last change was done by dealer when they were doing suspension TSB in last winter and it was free. So I took a look at rear diff and oil is green like the antifreeze. Thats not synthethic oil is it? Any ideas? If it is synthethic I am not going to touch it since it is super clean.

BTW my LSD preload is around 150 lb/foot of torque ( it takes around 150 lb/foot torque on the wheel to slip clutches.)

 

Sometimes it'll turn green if you get water in the oil.....

Have you been offroading at all? If yes.... are your diff breathers extended?

 

Im not sure but i think the synthetic oil the toyota uses is green. If it was wet i would be milky and possibly green but very milky.

 

Ah its gone anyway but I doubt was synthethic, so I have Delvac in with GM additive. I can not hear chatter as used to be when synthethic was added. I mean so far this worked better then Mobil 1 + CRC or Amsoil additive. And I know my LSD is working. So maybe it will work. I will give good run over next 3 days and see what happens.