LPG

https://www.statista.com/statistics/788673/number-of-liquefied-petroleum-gas-lpg-passenger-cars-eu/

https://web.uta.com/en/fuel-577b/autogas-lpg

https://www.aygaz.com.tr/en/cylindergas/technical-features-of-lpg

The pressure of the cylinder gas varies between 2 and 3 bars depending on the ambient temperature; however, the operating pressure of the cylinders is designed to be 17.5 bars.