Interesting points you make.  Brazil, as I understand, is pushing to using more Ethanol.  I am curious.... is Brazil requiring(?) vehicles to be made with these engine design tweaks, so they can optimize the use of higher mixes of ethanol?  And if that is true, world-wide car companies - such as Ford - making engines designed to optimize ethanol? or is it car companies that are local to Brazil that is doing this work?  (I presume it is world-wide car companies, but I thought I would ask.)