What I have noticed is that on the various MG4 Facebook groups the oil leak hasn't been mentioned for several weeks now.
Can't leak indefinitely I guess, and gentle drivers will see their leaks diminish quicker.
What's left in there will likely be the volume equivalent of 2 cans of coke ( and probably a similar colour )
IMHO even if this amount is just enough to throw oil to the upper reaches of the box, its going to degrade quickly just because it's a tiny amount of oil, around 1/3 of what's in my 110BHP leaf.
Meshing gear teeth give oil a hard life, shearing and breaking the long molecular chains in the lube, reducing it's viscosity over time.
I saw this first hand when I changed the oil for the first time in my leaf at around 100k miles.
The oil was filthy and flowed like water, and both of the magnets on the fill and drain plugs were not only covered in metal silt, but tiny chunks of gear teeth
You could see under a magnifying glass evidence of 'micro welds' on these gear tips, showing a total lubrication failure and metal to metal contact, despite plenty of oil being in there.
Has made me very sceptical about the 'no need to change' spouted by manufacturers.
It should definitely be done every 50k minimum IMO.
That and a PROPER brake stripdown and clean is what an EV service should consist of, not the box ticking, washer fill up, and swirly car wash nonsense people usually get.
