I have set up our products on several D&S 5000's. If I recall correctly, you end up using 5-6 gallons of "stock" solution for presoak. And yes, that is about a 1/3 higher than most automatics. As far as 200ml I am assuming you are talking about straight presoak. What is your cost per ml and we can probably tell you if you are close to average. My presoak cost per car with the D&S is typically around $.60-.70 per car to really clean well. I like the simplicity of the machine but don't like the consumption.