Petrol ethanol blend: Karnataka State Taxi and Maxi Cab Association urges the Centre to compensate vehicle owners for engine damage caused by fuel exceeding the 20 percent cap. Hosapete (Vijayanagara district): Expressing concerns over reports of ethanol content in petrol samples collected from fuel stations across the state exceeding the prescribed 20% cap, Karnataka State Taxi and Maxi Cab Association has called on the Centre to ascertain the veracity of these claims.