I am getting ready to renew the coolant on my K75. I see all kinds of various brands of coolants listed in mt Clymer manual, but of course noone of those are available at my local autosupply stores far away from dealerships.
What about good ol' Prestone for aluminum engines? I see it has a corrosion inhibitor and is made for aluminum engines....can't see that it contains nitrides by the label.
Anyone used the normal stuff of should I just do a mail order and try to dispel the "cheapest thing on a BMW" myth?