MY01 WRX Gearbox Oil

Manual 4L, Auto 9.3L according to Castrol Aus. Cheers

Thanks.

Hmmm, I looked in the manual that came with my car and it says 3.5L

That's probably about right for the sump (I've got an OB & previously a Liberty) but then the filter takes a bit too. Drain well, add plug, filter, 3.5L and idle for a minute or so. Leave off for 5 minutes and check again - it'll probably take some of the half litre to go up to the mark. Of course then you'll have to find some twisties to make sure everything's being adequately lubricated ..... Cheers!

So if I buy 4L I should be pretty safe... I just don't want to get half way through changing it and find I don't have enough but as the stuff I am putting in is resonably expensive I don't want to be left with like a litre of the stuff.