2003 forester

[John]

I was wondering what type off oil is used in the front differential. I
checked my dip stick and the fluid is on the low side.

 

[Frank]

I was wondering what type off oil is used in the front differential. I
checked my dip stick and the fluid is on the low side.

My '03 Forester's owners manual says API Classification GL-5, whatever
that means, but not to mix different manufacturers.
Did not know I was supposed to check this monthly.