Conversion of petrol to LPG fuelled vehicles is often carried out by mechanics who are not professionally trained in Ghana. Therefore this study was carried out to assess the effects of conversion systems of petrol cars to LPG by local artisans. Data was collected through three techniques namely observation (i.e. Fifteen LPG installation garages), survey (112 questionnaires) and interviews with LPG installation expert from Don Bosco Training Centre in Tema, and local workshop owners. A total of 112 questionnaires were administered to LPG installation mechanics and drivers sampled randomly from the study area. The study clearly shows that most of the apprenticeship trainings were carried out by unprofessionally trained LPG installers under trees and in open garages which were not standard automobile repair workshops. Most of the vehicles do not have any safety detectors installed in them. According to the drivers, it was very difficult to detect leakage unless they smell the odour of the gas.