Petroleum ministry reports ethanol compliance in tested E20 samples

On 7 November 2026, the Ministry of Petroleum and Natural Gas released results from an E20 fuel quality exercise covering 27 states and union territories in India. All 893 samples tested were within the specified ethanol range of 19% to 21%. The exercise drew samples from depots and retail outlets of Indian Oil, Bharat Petroleum and Hindustan Petroleum. The 56 samples from Karnataka all registered between 19% and 20% ethanol.

The announcement responded to Karnataka’s report of ethanol readings of 26% to 31% in petrol from certain outlets. The oil companies disputed whether those readings had been obtained using the prescribed sampling and testing procedures. They sought joint sampling and independent testing under the applicable standard. The monitoring results establish compliance for the samples in that exercise. They do not constitute a joint retest of the samples cited in Karnataka’s announcement.

Facts to remember

• The ministry announced the findings on 7 November 2026.
• The exercise covered 893 samples from three oil marketing companies across 27 states and union territories.
• The specified ethanol range was 19% to 21%; Karnataka’s 56 monitoring samples fell between 19% and 20%.
• IS 17021 is the Indian standard for E20 fuel.

Background

E20 is petrol blended with ethanol at a nominal share of 20%. IS 17021 specifies requirements for the blend, including how ethanol content can be determined. The monitoring exercise used the water extraction method described in Annex C of that standard. The choice of test method matters when results from different sampling exercises are compared.

Why it matters for exams

For CLAT Science and Economy, revise ethanol blending and the difference between a fuel specification and a finding from a set of samples.