[Gasoline Fumes]

I wasn't very scientific about it, but I tested this recently. There's a hill I can coast down, starting at 50 MPH and ending at a stop sign. I usually end up going around 22-23 MPH where the road levels off before I need to brake. Windows are usually closed or slightly open. I tried it with all 4 windows open in the Wagon. My speed dropped down to 20 MPH. All done on different days, but the windows closed speed of 22-23 MPH has been pretty consistent.

My friend's heavier and more aero 2002 Jetta only drops to 35 MPG on the same road.