What is the best amount of gearbox oil to add?
I've seen 2.1L mentioned by a lot of people, but also heard that only filling with 2L is better.
The gearbox oil I am going to use is this stuff from Peugeot:
Total Transmission Bv 75w80
The last time I changed the box oil nothing came out of the level check, so I stopped at 2.5L (probably to do with angle of my garage and car). I would prefer to put in a measured amount.
As I see is common, my box is bit notchy going into second, especially when cold. What is the best amount of oil make these changes smoother and achieve the best longevity of my gearbox?
Thanks