The MINI factory recommends this factory anti-freeze/coolant for your MINI. Specially formulated with no Phosphates or Nitrites to ensure compatibility with your MINI Cooper and S. The factory recommends replacement every 4 years but many owners like to change more often.
Factory recommends a 50% mix of coolant and water. Coolant comes in one gallon bottles, may be labelled 'MINI' or 'BMW' depending on supply.
Approximate capacity of cooling systems:
Both Gen 1 and Gen 2 MINIs)
Cooper 5.6 qts
Cooper S 6.3 qts
Do not add coolant to the cooling system when the engine is hot. Escaping coolant can cause burns.
See instructions on drain and refill here.
Comply with applicable environmental laws regulating the disposal of coolant additives. Always dispose of used anti-freeze according to local laws and regulations.
GROUND SHIPPING ONLY.
Here is an interesting post from a popular MINI forum:
I'm a Master Level ASE tech (plus L1 and X1 cert)., and I teach Automotive Technology at a local Community College.
You guys putting in the wrong fluids keep me, and my students who go on to join the tech workforce in business.
Lets just say in my time dealing with European cars since 93' I've seen more than a few water pump impellers dissolved, heads fail, rotted intakes, and cooling system woes.
It's simply not worth skimping on. I'm not saying you have to march out to the dealer, but you should research who makes the OEM fluids and stick to them.
People forget the chemistry in today's cars is as complex as the electronics.