New duties: Petrol Rs 3.5, Diesel Rs 25.5, ATF Rs 22. Here's a look at the revised export duties and the latest petrol, diesel and CNG prices across major Indian cities. On July 16, the Centre had increased export duties on diesel and ATF while lowering the levy on petrol. Although export duties have been revised, oil marketing companies (OMCs) continue to publish retail fuel prices separately. Export duties are imposed on refined petroleum products to help balance domestic fuel availability with export opportunities for refiners.