I am beginning to wonder if, rather than your MPG dropping by 25%, that instead your math skills have improved by that same 25%. Either that or your odometer was way off when you were seeing these improbable MPG numbers. The likelihood of an AD with the wind resistance of a 5'X 7' brick wall getting 20 MPG at 70 MPH (or even 60 MPH) defies the law of physics, regardless of engine, number of carburetors, gear ratio of transmission and rear end. I may be all wet. I am just spitballing here.
Carl
