Several recent threads about changing gearbox oil has reminded me I should take out the 3.2 litres of oil from my F40 and replace it with 2.4 litres, which should make the gearchanges smoother. I've procrastinated in the past, as I can't be bothered to remove the battery box/tray, especially as my HID ballast box is stuck to the inside of the battery box and I've have to unstick that first. But now I'm hatching a plan whereby the battery stays in place and I'll use a long clear tube, put one end in the refill hole and the other end attached to a squeezy bottle with the gearbox oil in it, and fill the gearbox with the new oil the lazy way.
Anyway, whilst idly perusing the Halfords website for gearbox oil, (I'll be using GM oil from the local Vauxhall dealer when it comes to doing it for real), I happened upon something called Molyslip gearbox oil additive, which apparently helps protect the moving parts by coating them with molybdenum, which quietens the gearbox and prolongs the gearbox's life. Has anyone used this stuff before? Any positive or negative comments on it?