12.Apr.2021 - Today, a few basics on the subject of fuel consumption in turbocharged gasoline engines:

"Power = air turnover per unit of time" basically applies to the gasoline engine. This means that we have to increase the boost pressure in the gasoline engine to increase the engine output. This increase in air turnover must be gasified with gasoline so that the mixture remains ignitable. This means that if I use the extra power, fuel consumption will also be higher due to the greater air turnover - but only where I use the extra power extensively.

If one wants to save fuel with the gasoline turbo by increasing power, the driving style MUST be adjusted. For example, you can use the extra torque to drive at lower speeds in a higher gearshift. This also works with the automatic transmission: briefly lobbing the throttle normally shifts the transmission up a gear.

Filling up with 95 octane or E10 is usually a mistake with performance-enhanced vehicles. The knock control system automatically reduces the ignition angle and boost pressure, so there is hardly any extra power. With 98 octane, not only can the extra power be used, but the knock control can also run a sharper ignition angle in all ranges, which significantly improves efficiency and thus fuel consumption.