Hello, drive a Opel Astra J with the 1.6 suction cup with 115 hp (EZ 6/2015). Normal Super 95 is recommended according to operating instructions. So I drove a whole time. Since the engine has small hum frequencies at 2000 rpm, I tried it with E 10 and then also with Super Plus (98). Quite amazing was that the car with the 98ger fuel permanently had about 0.7 liters more consumption. However, the engine noises became slightly quieter, somehow more pleasant. the “higher” fuel actually consumes more??? Then you are almost twice punished.