> So consumption increases about x1.5 from the "best case" to "autobahn speeds"? Yes, pretty much. I wouldn't say 1.5x is a constant factor. If I drive at 200

> So consumption increases about x1.5 from the "best case" to "autobahn speeds"? Yes, pretty much. I wouldn't say 1.5x is a constant factor. If I drive at 200+kph (e.g. 240kph) then consumption explodes. This stuff must be online somewhere, but for me at least it seems that consumption increases exponentially (e.g. x^2), which makes sense since air resistance increases with v^2.