Antifreeze Prestone or OEM BMW

Only use bmw brand it has special additives for the electric water pump

Only the OEM bmw blue coolant. Don\u2019t use anything else.

BMW coolant; it\u2019s cheapish, certified, and you should need it again unless a leak issue.

Replace the orange stuff with new Prestone orange stuff.

For coolant - cheap Prestone (concentrate) got my old Speed3 to 60 000km no problem. I used 25% glycol and 75% distilled water and a couple caps of redline water wetter. No more overheating, even idling in +35°C.

The blue stuff is definitely better than the green from my experience. I use the overpriced bmw shit but I think you could probably use the cheap blue stuff just as well.

Don't buy BMW coolant it's overpriced just like everything else they sell. Blue coolant is preferred but the premixed green stuff isn't going to cause catastrophic meltdowns. My 97 328i has the green stuff and I've got no issues after 196k miles.

Prestone European Vehicles Antifreeze & Coolant states, Superior guaranteed protection - 5 years / 150,000 miles. Prestone Platinum All Vehicles Antifreeze & Coolant states, Extreme protection - 15+ years / 350,000 miles.

I use the orange dexcool stuff found at most auto parts stores. I think it's prestone, but I don't remember

Do not use Prestone 50/50. It is technically compatible, but it is a different formulation. Using Prestone 50/50 will shorten your service intervals to 36,000 miles. Beyond 36,000 miles you will cause damage to occur to the seals.