Sobek, The oil is diluted to make lower viscosity for starts at cold temperatures. (By the manual: For -10°C it's about 2 minutes of diluting. The engine oil must have temperature bellow 50°C to prevent evaporating of fuel. The engine must be turned on to make oil well mixed.) But after the engine is heated up, the oil pressure keeps under the nominal. So I am not sure if the fuel evaporation is simulated.