Other than its blue, and normal stuff is usually green...

I'm just about to replace the thermostat, thermostat housing (and thermo gasket)... and I'm not too thrilled with my bentley telling me that the entire system hold 12.5 liters of coolant! I'm going to have to go to the stealer and buy 3 jugs of bmw coolant at 15 bones a jug... which will double the cost of this fix.....

any alternative to BMW coolant?