This report presents a general overview of the results of automotive LPG vehicles that have been tested within the framework of the Dutch In-Use Compliance programme for passenger cars over the years 1999 to 2003. The work in these years was executed under a contract with the Dutch Ministry of Housing, Spatial Planning and the Environment. The report on this subject has been written on special request of the Ministry. The passenger car in-use compliance programme basically assesses car emission performance in use, against the corresponding emissions legislation. In additions relevant data for emission modelling purposes are gathered. The results presented in this report are anonymised, since it is not the purpose of this report to point out typical manufacturer related issues, but to give an overview of the vehicle emission situation.