The current levels of world motor gasoline quality are introduced and its developing trend is ana- lyzed.

This paper analyzes the status of motor gasoline production in China and the disparity to the new international stan dards of clean motor gasoline.

The testing methods for determination of some hazardous substances in motor gasoline, as well as theapplicable range and sample size of them are reviewed, and items to be attention paid are set forth in combination withworking practice.

The quality standard of automobile gasoline and its developing trend.;

When EDXRF (ASTM D 4294) is applied to test sulfur content, the determination result of sulfur content for low sulfur automobile gasoline will be higher than reality in the case of gasoline containing MTBE, C7/C8 and reforming gasoline because of influence of matrix effect.

The actual quality of China's automobile gasoline are introduced, and the development direction for thedomestic automobile gasoline is suggested based on the requirements set forth by automobile manufacture industry andthe more and more severe environmental protection regulations.

To produce more quality automobile diesel with low cost, we must pay more attention to the development of catalysts and processes for deep removing sulfur and aromatics from diesel and for increasing diesel's octane number.

The developing trend of automobile diesel in the past several years in most of the countries in the world is mainly characterized by highlighting the reduction of sulfur,increasing cetane number and further reducing aromatics and polycyclic aromatics etc in diesel.