Sorry, i forgot to write all thats 'imo'.

I've thought of putting my own drain plug in the B5 before, at lowest point.

My xr2tt B5 box with ATB diff i still runs gl4 80/90, and i change the oil once a year (6k miles) or if i have it out.
(ps Quaife say GL4 is best with their ATB's)


PS, i use Morris oils for all my oil needs, so its all top quaility.