In relation to your question, I am not consumed antifreeze, I imagine it was as you told me, because of the cold climate it is that it took that water, the moflero told me that the catalyst was increasing and converting the gas into water and that is why the silencer was oxidizing, but I notice that the smell there continues, I just feel it when I pray the car in the morning, on a occasion I ask an engineer to ask an engineer. A friend's truck smells bad after a while with the engine on you feel a fallen smell, and he replied that it was the oxygen sensor, I don't know if it stuck or not, the truck is a ranger Ford, a American 94 model 94, now that my wife's chevy also olia badly but this olia of raw gasoline as if he stubborn. For my pocket I have the hoses, haha by the way they sent me a manual of how to manufacture a gasoline save then I send you the manual so you can see it if you like it and you dare to make one for your car, I have not read it well but it is like a hose and magnet