new delhi, Sept. 11 -- The government is working on fuel efficiency norms for the country's massive two-wheeler market, according to three people aware of the development, after tightening similar regulations for cars and trucks in a bid to cut crude oil imports and meet net zero carbon emission goals by 2070. The ministry of road transport and highways, the Bureau of Energy Efficiency (BEE), the Bureau of Indian Standards (BIS), and the government's think-tank NITI Aayog have started initial discussions on a policy to regulate fuel efficiency of two-wheelers and nudge automakers towards producing cleaner vehicles, one person said, requesting anonymity. "The discussion on two-wheeler fuel efficiency norms is in very early stages, and it may be taken up in due time after the government completes implementation of similar regulation for other vehicle segments," the person said. India is the world's largest two-wheeler market by sales, with motorcycles and scooters making up the majority of new vehicles registered every year. About 19 million, or 76%, of the 25 million new vehicles registered in FY25, were two-wheelers. Of these, 17 million were petrol two-wheelers. Nearly all of the country's petrol is used by the transport sector, which consumed a little over 40 million tonnes in FY25. This has increased India's crude oil import bill, with the world's most populous country becoming the third-largest importer after China and the US. In consultations on fuel efficiency norms for trucks in May and June, when the industry sought exemptions for smaller trucks weighing up to 3.5 tonnes, officials indicated that all vehicles would be covered under fuel efficiency regulations, two people said. "The officials were clear that all vehicle segments will be brought under regulation similar to CAFE (corporate average fuel efficiency) norms for passenger vehicles. That is why the N1 category of trucks, weighing up to 3.5 tonnes, were also included in the CSFC (constant speed fuel consumption) norms, and it indicated to the industry that even two-wheelers may face these norms," said the third person cited earlier, also on condition of anonymity. A draft notification for the norms for trucks came out in late July. Email queries sent to the ministry, BEE, BIS and NITI Aayog on 8 September remained unanswered. NITI Aayog said in an August 2025 report on electric vehicles that there was need to move to mandates in public policy from a focus on just sops, and that expanding CAFE norms to a wider segment of vehicles was an option. The think-tank recommended that the government take this action in the next year. CAFE norms cap carbon emissions by an automaker's passenger vehicle fleets while constant speed fuel consumption (CSFC) norms place similar curbs on emissions by trucks. The next iteration of CAFE and CSFC norms will come in April 2027. Email queries to two-wheeler makers Hero MotoCorp Ltd, Bajaj Auto Ltd, TVS Motor Co. Ltd, and Honda Motorcycle and Scooter India Pvt. Ltd remained unanswered....