Abstract: Bench and vehicle tests and a computed tomography (CT) scan were carried out to investigate the influences of ash contents in lubricants on the durability and soot regeneration of gasoline particulate filter (GPF) with the rapid ash accumulation method. It was analyzed that the data obtained from the tests including engine torque, exhaust system back pressure, ash mass, emission effects, and CT profiles. The results show that the higher the ash level in the lubricants, the more ash is produced and the greater arrested proportion of GPF is obtained; the accumulated ash in the GPF can cause the degradation of the engine performance, but the gas emission can be optimized; a small amount of ash can increase soot regeneration speed, but too much or no ash will reduce its regeneration speed.

Key words: gasoline particulate filter (GPF) , lubricant, durability, soot regeneration, ash