The KIA Rio III operating instructions state that the vehicle is designed to use only unleaded petrol with RON 91 (AI-92). The vehicle is designed to achieve maximum performance when unleaded fuel is used. The use of such fuels minimates the toxicity of emissions and the pollution of spark plugs.
Most of the owners are convinced that it is better to use 92 gasoline, justifying it by saying that the Rio engines are tuned specifically for such fuel, as mentioned in the instructions. That's what the statistics say. About 60% of the surveyed owners are in charge of 92nd, about 35%-95%.
