The Research and Motor octane numbers of Liquefied Petroleum Gas (LPG)

► A comprehensive set of octane number data for LPG mixtures was obtained. ► The test methods used were consistent with the ASTM methods for liquid fuels. ► The RONs and MONs for LPG were non-linear with respect to fuel composition. ► Existing fuel standards constrain LPG's RON to be far higher than standard gasolines. ► These observations have implications for the design of future LPG quality standards.