WHICH OIL?

[Ravi]

I NEED TO CHANGE MY GEARBOX OIL AND DIFF OIL IN MY 1987 325I SPORT, ANY ADVICE? ONLY GOT A SMALLL BUDGET AS WELL

[bullitt]

For 5 speed transmission, use Redline
(http://www.redlineoil.com/gearoil.htm) MTL. It will make shifting smoother.
Particularly in cold weather.
Redline also has a rear differential oil 75W90 or 75W90NS (for non
LSD diffs). Avoid Redline if you have a LSD and over 100K on your E30. 75W90
Redline product will make you differential unbearably loud. Instead, try
80W90 weight products like Mobilube HD
(http://www.mobil.com/consumer/lubes/lubes/mmatf_fr.html).
75W/80W GL-4 gear oil (Redline MTL) is equivalent to SAE 5W30/10W30
engine oil viscosity. So yes, you can use engine oil in the transmission. In
fact that's what most shops do.

[320Touring]

Ideal!I was just about to post about this,

Cheers dudes!