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In Reply to: I run BMW coolant (stupidly expensive)... posted by michael on August 12, 2001 at 10:36:23:
If not, then I can ignore this mistake and make sure from now on I will NEVER use the PEAK brand and always use PRESTONE, which is phosphate free,
Sam
for that reason, phosphate free. Those white deposits are a result of the phosphate. I think "Al. head safe" just means that it will not eat your head. The deposits reduce the heat transfer.