India's proposed third phase of Corporate Average Fuel Efficiency standards is more than a technical adjustment to vehicle testing. It could shape which passenger cars manufacturers develop, price and promote between 2027-28 and 2031-32. The government released the draft on July 16 and has invited stakeholder comments until August 6.
CAFE rules work at the level of a manufacturer's fleet rather than treating every model as identical. A company selling several heavier or less efficient vehicles must balance them with models that lower the fleet average. This approach gives manufacturers flexibility, but it also turns product planning into a compliance decision spanning engines, vehicle weight, alternative fuels and electric sales.
The policy objective is straightforward: reducing fuel consumed per kilometre can lower oil demand and emissions while encouraging investment in efficient technology. The route is less simple. A target that moves faster than supply chains or charging infrastructure may raise costs; a weak target may preserve short-term convenience while delaying designs that competitors in other markets are already developing.
The draft period therefore matters. Regulators need credible evidence on testing methods, real-world performance, treatment of low-volume manufacturers and the way different powertrains are counted. The rules should reward genuine efficiency rather than changes that perform well only under a laboratory cycle. Transparent reporting would also allow consumers and independent researchers to see whether fleet averages improve in practice.
For carmakers, compliance is likely to involve a portfolio rather than one preferred technology. More efficient petrol engines, hybrids, CNG vehicles and battery-electric models can each affect the average, but they have different costs and infrastructure needs. Companies with a broad range of compact vehicles may begin from a different position than brands concentrated in larger premium models.
Consumers will experience the policy through purchase prices, running costs and the models available in showrooms. That makes stable rules and adequate lead time important. The strongest final standard would set a demanding but measurable trajectory, disclose how compliance is calculated and resist exemptions that undermine the fleet-wide goal. The consultation is the point at which those design choices should be tested in public.
