India, Aug. 8 -- State-run oil marketing companies (OMCs) on Friday said nationwide tests of E20 petrol found no evidence of high moisture or chloride contamination, challenging concerns over the Centre's ethanol-blending policy.

According to the test reports, fuel quality remained within prescribed limits across the supply chain, as concerns persist over the suitability of blended fuel for older vehicles and its impact on mileage.

Indian Oil Corporation (IOC), Bharat Petroleum Corporation Ltd (BPCL) and Hindustan Petroleum Corporation Ltd (HPCL) said the Centre had prescribed specifications for chloride content in ethanol used for blending.

As per the statement, high-frequency monitoring was implemented at refineries, distilleries, de...