Jia? Stowe's oil pollution cleaning ability is ok. Did I change G when my car was full of sludge? T demon? Red machine? Oil, this oil is of high quality. What is the effect of cleaning sludge? The fruit is good. The waste engine oil I changed for the first time after use was particularly dirty. Later, it was cleaner every time, and the basic sludge was gone three times. The maintenance mileage of this oil is better than that of Jia Jia? How long is it? Running 15000 km at a time is really worry-free.