The quality of 95% of the fuel meets the standard. After refueling at the Kazakh Oil gas station in Balkhash, the check lamp lit up in my car. After I burned all this gasoline, I began to experiment and refueled at other gas stations, but the "check" continued to burn. However, after refueling at the Askar gas station in Kosshy and driving several kilometers, the check lamp went out. Hence the conclusion that the fuel at this gas station is good.