Phase 1 fuel consumption standards for heavy-duty vehicles (HDVs) took effect in India on April 1, 2023. While they are an important first step, they do not exploit the full potential of already existing technology to reduce fuel consumption from heavy-duty trucks (HDTs). Additionally, vehicle technologies are expected to continue to advance. This paper makes policymakers and others aware of the potential benefits and costs of fuel consumption reduction technologies and provides evidence of technical and economic feasibility to support a future, more stringent fuel consumption standard for HDVs in India.