Must be a plumber in Wisconsin. What is all going on under the hood? I bet he could remove all that heavy metal tubing and elbows and gain another 3 MPG. Then he could use the cruise control.
Additives, heat on fuel lines and on intake is what I read. But what a spaghetti farm under there. I will never consider the few extra lines I have on my Rabbit for the WVO system to be a clutter to the engine bay again. Wow. Makes you just want to rip into it and clean it out.