New Delhi, June 12 -- The government has exempted excise duty on up to 30% ethanol component in blended petrol, which, according to experts, will proportionately reduce India's energy imports and may also improve margins of stressed fuel retailers as oil companies may not pass the benefit to the consumer. According to a finance ministry's notification related to the central excise on June 10, which contained four orders to exempt various elements of levies, the current waiver is applicable for four variants of ethanol-blended petrol (EBP) - 22% ethanol with 78% petrol (or E22), 25% or E25, 27% or E27 and 30% or E30. The duty exemption is subject to conformity to quality standards specified by the Bureau of Indian Standards (BIS), the notifi...