R56 Cooper S - Which engine coolant? - MINI Cooper Forum

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post #1 of 9 (permalink) Old Nov 5th, 2012, 07:43 PM Thread Starter
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R56 Cooper S - Which engine coolant?

Hi guys,

My recently purchased R56 Cooper s (56 plate) is at the minimum mark for engine coolant on the reservoir - so it needs topping up. The damn manual says to consult Mini Service, which is a pain... and trolling the internet hasn't helped come up with any answers either.

I hear its bad to mix coolant, but all I'm wanting to do is to top up the reservoir a bit to get it off the minimum mark. I've found a 'ready mixed' antifreeze solution from Halfords, but it doesn't say anything about it being BMW/Mini approved - but it does say Audi, Ford, Seat etc. and does have OAT (it's a red solution)


does anyone have any suggestions?

many thanks
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post #2 of 9 (permalink) Old Nov 5th, 2012, 08:03 PM
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Can't you just go to your local mini dealers parts department and ask for a litre of anti-freeze/coolant. I'm sure they sell it over the counter.
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post #3 of 9 (permalink) Old Nov 5th, 2012, 08:16 PM Thread Starter
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I could, but i don't live in the city... there isn't a 'local' dealership unless i drive for like 45 minutes, and I work most days. The nearest place is a halfords, so if i can get it without going out of my way, then the better.
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post #4 of 9 (permalink) Old Nov 6th, 2012, 07:15 PM
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It's the blue BMW spec coolant you need, can be bought on ebay if needed.
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post #5 of 9 (permalink) Old Jul 10th, 2015, 09:24 AM
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Searching on Eurocarparts using my MCS registration throws up their "standard" blue antifreeze / coolant. Does anyone know if this stuff is actually suitable though !?
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post #6 of 9 (permalink) Old Jul 10th, 2015, 09:07 PM
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Hi cupofjavaa. I've heard that if you mix pink OAT with blue you can get some chemical precipitation although I've actually never seen it.

Pink usually lasts 5years whereas blue tends to get exhausted after 2years...if you wanted to change type you'd have to make sure to flush all the old out which would be a bit of a pain...

You've got blue in atm so imo don't complicate anything and stick with it. There's bound to be some old coolant stuck behind the thermostat that will mix ok.

I've found the closest to the MINI stuff is Comma X-stream G48. I've bought concentrate and mixed it 50:50 with distilled water and I've also bought it 'ready-mixed.' It costs about the same. I wouldn't personally mix the concentrate up with tap water. You can buy a little cheaper but I would certainly replace any blue coolant every 2 years without fail!

Don't forget to keep bleeding the system over the next few days and monitor the temps if you can.

I tend to change coolant (and gear oil) every 2 years; engine oil around 7-8000mls. It's cheap enough if you can d-i-y. I don't believe those statements that fluids are 'filled for life'.
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post #7 of 9 (permalink) Old Jul 10th, 2015, 09:17 PM
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When I looked on Halfords it tell me this stuff, which seems about right.
Halfords | Comma G48 Antifreeze and Coolant Conc 2L
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post #8 of 9 (permalink) Old Jul 10th, 2015, 11:28 PM
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haynes manual says ethylene glycol based, the blue stuff (6 litre capacity). best mix it to a 50/50 ratio if using a consentrate (gives protection down to -37 degrees c along with better antifoaming properties)
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post #9 of 9 (permalink) Old Jul 11th, 2015, 07:44 PM
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jh1488 this is how Comma describes it's G48:-

"Ethylene glycol based antifreeze and coolant with silicate based inhibitors. Protects against corrosion, overheating and freezing. Typical service life of up to 3 years. Safeguarded with bittering agent to help prevent accidental ingestion."

So it ticks all the boxes. I find you can't really get all the coolant out by undoing the bottom hose 'cos about 2.5l gets trapped in the engine block behind the closed thermostat.
I tend to buy a 5l container, get as much in as poss and save the rest to have another go a year later or use as top up.
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