VW probably said that just to cover themselves.
91/95 is the octane rating for the fuel suitable for your engine - 91 is the plain vanilla cheap unleaded & 95 is high octane more expensive unleaded.
Interesting reading - I don't think I would like to be in Brazil just know... - You should check out Jamie Orr's one week Saveiro build in Brazil on you tube - really mad water cooled stuff going on over there, all pretty much 8V with very big turbo's
Have to say I got a bit excited hearing a higher grade of ethanol fuel will be widespread...that is until I read up on how little ethenol was going in.
I can dimly recall E85 being available at Morrisons, but at the time I didn't have a decent car and like 99.867% of the population I wasn't clued up on what it was... wonder why it failed to take off!
Ethanol is the darling for tuners overseas, volumetrically it needs a lot more than petrol meaning bigger fuel pumps and injectors - but burns better and the shear amount of fuel they have to dump in cools the cylinders - really helpful in turbo cars
I have seen a TSI engined polo in a scrap yard - bonnet up, engine looks cover off, at a glance it looks just like a normal small block 16v - until you see the massive cast alloy growth on the cam box above the intake where the high pressure fuel pump lives. It definitely is a: once you see it you cant un-see it things!