Petrol quality debate: Karnataka Consumer Affairs minister Rizwan Arshad defends fuel tests and challenges Union Minister Pralhad Joshi over blending compliance. Bengaluru: Karnataka is not against ethanol blending, but against people being cheated by being sold petrol with 26-31% ethanol as E20, said state Consumer Affairs minister Rizwan Arshad in a sharp reply to Union Minister Pralhad Joshi..“Why is the Centre trying to turn a public interest issue into a farmer-versus-people debate?