Abstract This project adopts the way of watch the high pollution diesel cars by eyes and people accuse to call the diesel car to do the inspection in station. And use the way in blocking cars strictly to test the amount of their oil to put an end to use illegal oil. This project’s purpose and every procedure and achievement rate is as follows： The purpose and rate of achievement in the project The working condition now：（Data is statistics to March 31, 2003） 一、 Diesel cars’ inspect rate of progress：The quantity is amount to 4,636 cars，among these there are 277 test in the item of no burden to speed up suddenly，other 4359 cars are test in the item of full burden and stable speed，the rate of purpose achievement attend to 103.0%. The result is that 175 cars are unqualified，the rate is 3.77%. 二、 Oil inspect rate of progress：Until March 31, 2003，we’ve block cars on the road for 9 times, and test 200 cars’ oil quality. Otherwise，total oil quality inspection amount to 240 cases. And in the side of oil analysis result，there are 49 unqualified oil，and the rate is 20.4%. Unqualified oil’s average quantity are 0.35% of sulfur，much more than the standard（0.035%）. The qualified oil’s average quantity are 0.024% of sulfur，and amount to total sample’s average quantity are 0.091% of sulfur。 三、 Maintain and management smoking emission inspection station： 1.We’ve complete the public accident duty insurance，and the company is Fu-Bun insurance corporation. 2.We’ve finished setting up the security service system of smoking emission inspection station. 3.We’ve finished several fix work for smoking emission inspection station，and improve the water to full air facilities, digital video watching system, illumination in the night, the guide road sign around there、plant、 and inspection flow sign, etc…。

Tainan City,oil quality inspection,diesel cars