On Sunday I did the manual gearbox oil change... of course I was an idiot and opened the top fill hole all the way instead of only cracking it a bit and instead of getting the glug, glug, glug I was trying to avoid it came out all over, totally forgot about that tip! Anyway, I couldn't get an accurate reading of how much came out but I doubt it was a full 1.6L/1.67qt. I put in about 1.95L from struggling to pump it up in (Just get a long tube funnel, easier to fill that way from the top) but now shifting is clearly a bit smoother, a bit less clunky from 1st to 2nd and no more 6th gear whine! I used Ravenol MTF-2, as it happens to meet exact Ford spec, but of course there are a lot of options out there but I think everyone should do this if they haven't yet!