Fuel Economy of Passenger Cars in the Global South Fuel Economy of Passenger Cars in the Global South Fuel Economy of Passenger Cars in the Global South: A case of two steps forward, one step back as fuel economy improvements are reduced by increasing car power and weight   This report looks at fuel economy assessments for passenger cars carried out in 109 countries. Of these, 64 developing and transitional countries were supported by UNEP to carry out fuel economy baseline studies, with some of these countries also assisted to develop fuel economy policies. An additional 45 countries included in the analysis have their fuel economy data either publicly available or available through the IEA, a GFEI partner – see Annex 1 for the full list of the countries analysed.