I just left O'Reilly's auto parts after going there for anti-freeze. I noticed that they are selling 50/50 mix for the same price as 100% anti-freeze. Now, it's either a lazy man's way to add anti-freeze, (can't believe that, we who do our own maintenance ussually ain't lazy), or there 100% anti freeze is watered down. Humn, what do you think is going on?????