Answers: I have to read out that some of the answers to this question are bring for concern. You should definitely use coolant, mixed 50/50 next to distilled water. If you really want to know what BMW recommend, you should go to the purveyor and buy the BMW brand coolant by the gallon. I can tell you though that the formulation is probably transposable to Pentosin brand coolant, which is German made and great quality.
read the specs 4 your sports car and then find the specs 4 the coolant that you want to buy and if thay mach buy,,,, a first category kid would know that...
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