Report of the LPG In-service Vehicle Emissions Study
Further to the National In-Service Emissions (NISE) study a second smaller study was undertaken into emissions from vehicles running on liquified petroleum gas (LPG). For logistical reasons LPG vehicles were not tested in the original NISE study.
A number of important findings came from the study but the principal message remained: for LPG fuelled vehicles substantial emission reductions can be achieved by basic good maintenance practices. The study also demonstrated the benefits of using modern LPG fuel systems technology.