What’s the use of your truck?

Due to the ongoing debate about increased fuel costs, I would be interested in what your trucks consume minimally and maximally, as the consumption can often be reduced by predictive driving, please give a few tips. So I start with the start: I am currently driving a Scania R 380 with Opticruise 40t outward drive Empty return Fully unloaded terrain Central Germany Consumption 26ltr/100km minimum consumption 23 ltr max Consumption 30 ltr/ 100 km