thanks for all the help guys - this forum is great. I managed to locate a dealer in the city who sold g48 for 25 canadian a gallon - which is a bearable price for me, roughly what I would pay to order from bavauto. It was difficult to find, but I am glad I have that source now.

Side note - while I was there the parts guy and I were talking, and he ended up telling me that they don't even use distilled water in their service department for mixing with the coolant!