In the operating instructions for my 2,3ltr-bolden with the legendary 170 horsepowers it is to be read that he needs a clean lead-free fuel, which has its octane number between 91 and 98 ROZ. So depending on the mood and waiting time at the pump I refuel this or that. But mostly the 91 ROZ juice. (Finally no orthodontist) And thus my little one runs exactly as beautiful as with the “higher percentage” varieties. At least I don’t notice any disadvantage. I’ve never been in, on, on or next to this north turn (where is it actually?) to deduce myself on whole or tenth of a second or anything else. I like to drive comfortably and speedily – as far as it goes. But without infatuating the frenzy. So I ask myself, which pros-perspective drawbacks do you negotiate with this or that fuel? After all the concentrated “Knoff Hoff”, which I was allowed to read and learn here, I have a little hope, for this I have some hope. to be able to expect rich information.