Whats the right oil for the gearbox?

Just wondering what the best oil is to use in the gearbox please?

I use this stuff mate & think a few others do aswell

http://www.opieoils.co.uk/p-68901-fuchs-titan-race-syn-5-75w-90-fully-synthetic-gear-oil-was-silkolene-syn-5-75w-90.aspx

Ok how much will i need pal? And ive only just bought the car as you know so i dont know what has previously been used, i.e to hide any crunching gears. etc. So is this heavier oil to still keep the gearbox nice and smooth as the gears are like a brand new car.

I don't realy think thiker oil makes any difference to crunchy gears, mine crunches into 5th if I don't double cluth it at high revs.

You could try MT90, or go with the above.

& I THINK its 3.7 litres, unsure tho pal as I always by 5 incase

Okay cheers gaz I think I'll go with what you use because its cheaper lol and I'm Jewish