Method for measuring dilution of low-temperature engine oil of supercharged direct injection gasoline engine of passenger car

The invention discloses a passenger car supercharged direct injection gasoline engine low-temperature engine oil dilution rapid measurement method, belongs to the technical field of engine oil dilution measurement, and clarifies an engine oil dilution measurement method and specific rotating hub test conditions. In the product development stage, the vehicle state ensures that ECU data are normal, the engine works normally, under the condition that the temperature of a low-temperature rotating hub environment bin is-35 DEG C, a test is conducted according to the low-speed small-load working condition, meanwhile, the engine oil temperature of the engine is monitored, when the engine oil temperature reaches 40 DEG C, the test is stopped immediately, parking flameout is conducted, and after standing is conducted for 6 hours, the engine is stopped; and when the temperature of the engine oil is consistent with the environment temperature, continuing to carry out the small-load working condition test, repeating the