THEMA: Superbenzin mit 102 Oktan Z.b. Ultimet von Aral?

There are many opinions regarding petrol.
A good advise is to search "the net" as you can find test that have been conducted from 100% ethanol to 100% gasoline. The differences regarding efficiency or metal wear in cylinders are very close.

Regarding higher octane petrol it is for sure only a better ability to damping knocks with the ignition in the cylinders.
I would say the main reason for driving with high octane fuel is that you have less ethanol with it.
I use E5 petrol if possible instead of E10. As ethanol attracts water it therefore is corrosive to metal and aggressive to plastic and rubber.
Regards PerS

All types of ARAL gasoline have up to 5 percent ethanol. It stands on the side of the gas pump.