New Delhi, Nov 7 (UNI) Congress leader and Leader of the Opposition in the Lok Sabha Rahul Gandhi on Saturday accused the Narendra Modi government of misleading consumers over the ethanol content in petrol, alleging that laboratory tests of fuel samples collected from seven districts of Karnataka found ethanol concentrations exceeding the prescribed 20 per cent blending limit in 11 of the 14 samples tested. Coining the slogan "E20 has become 420", Rahul Gandhi alleged that motorists were paying for petrol but receiving fuel containing substantially higher proportions of ethanol, potentially compromising vehicle performance, reducing mileage and increasing maintenance costs.…