I went to France from the Czech Republic in August and in the Czech Republic, it is very easy to pick the right kind of petrol, Diesel, Natural 95 or Natural 98. No idea whay it is called "natural" but at least you can always see the number 95 which is the one for me. BUt for some stragne reason, in Germany, not sure in France, they don't show the octane number so I had to ask whenenever I wanted to buy petrol, never sure, whether I was buying 95. They call it Super, Benzin or something like that. But to make it even more complicated, at one or two petrol stations, I was staring at something green saying something bio or ethanol and it said something "only for modern engines and if you are not sure, check your manual" or something. So I was not sure what I had to buy so I asked a guy next to me and he said soemthing like "if you like nature, buy that green stuff". It was about the same prize and I guess Panda's engine is pretty modern, still, even in 2012, so I opted to buy the standard stuff. But once I think, possibly in Switzerland, I bought the green stuff, as I thought it was no problem, I think it said it contained 95 % normal petrol and the rest was some green stuff. Does anyone have a clue what I actually bought? No problem with the engine, fortunately. Now I know, as my brother is doing it, there is this bioethanol, but that is completely different and cannot be used in standard Panda. I hope I didn't buy that, but probably my Panda would not run too far with that stuff. BTW this new bioethanol thing is supposed to boost the engine power about 10 percent. But then you cannot drive around Europe as you would have to drive just where the petrol stations sell that stuff. And you have to have your engine modified for that bioethanol stuff.

I think this "nature" stuff is high in Bio Ethanol. An alcohol based fuel made from fermenting sugars from vegetable matter which they mix with petrol.

Most manufacturers these days will test there cars to run on a mix of petrol and ethanol safely, typically it's to a ratio of 9 petrol to 1 ethanol.

I think it's referred to in Germany as Super E10 (95 octane) 10 as in 10% Ethanol.
Where normal Unleaded is called Super (95) and Super Plus (98).

Ethanol doesn't quite have the same "punch" as petrol and can lead to slightly less mpg, though blends are often sold with a lower tax to make it cheaper.

Some cars will now run on a much higher ratio and places are starting to sell it here in Europe, though the likes of Brazil have been running all there fuel like this for a while, I think it's at a mix of around 3 to 1 at the moment.

There are still a few issues with some cars using it in higher blends, there's something in it that certain compounds don't stand up to, seals and resins in certain parts can rot away.
(any one with a fibreglass tank on a motobike will no doubt know all about it as UK fuel is slowly creeping up in Ethanol)

Thank you. So now it makes sense, it is as you say, I remember now the names for those different kinds.