Is this record?

Today – a nice warm day in May, it is 17° Celsius – I may have a record, so far it is a record anyhow.
When I drove home in the afternoon I measured an average consumption of:
ONLY 1.8 liter/100 km over a distance of 46 km. The journey was partly country road approximately 20 km (at 70 km/h), the rest 26 km was on highway (at 90 km/h)