Abstract: In order to investigate the driving applicability of independently developed GF-5 5W-30 bio-based gasoline oil in Toyota Privia vehicle, two stages ofroad test(5 000 km for stage A and 10 000 km for stage B) were carried out, and oil samples were extracted and analyzed at different mileage according to the national standard GB/T 8028—2010 "Criteria for changing of gasoline engine oil" on the kinematic viscosity, acid value, base value, n-pentane insoluble matter, metal content, moisture and other indexes of GF-5 5W-30 bio-based gasoline engine oil samples. The results showed that after the two-stage road test, the kinematic viscosity (100 °C) change rate of GF-5 5W-30 bio-based gasoline engine oil was less than ±3%, acid value growth was no more than 1.76 mgKOH/g, the difference of base value and acid value was greater than 2.9 mgKOH/g, n-pentane insoluble matter growth was no more than 0.1%, metal content growth was no more than 9 μg/g, water content was no more than 2 000 μg/g, all the indicators were within the range of technical requirements of the national standard GB/T 8028—2010. GF-5 5W-30 bio-based engine gasoline oil had excellent performance and could meet the requirements of the vehicle. There was still a margin when the oil change period reaches 10 000 km.

Key words: GF-5, gasoline engine oil, road test, bio-based