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How to Identify China 6a or China 6b?

1 Answers

JulietteRose

07/29/25 7:44pm

China 6b has not been officially implemented yet, and most vehicles on the market that comply with the China 6 standard currently meet the China 6a specifications. I. China 6a specifications are as follows: 1. Gasoline vehicles must not emit more than 700 milligrams of carbon monoxide per kilometer driven. 2. Gasoline vehicles must not emit more than 68 milligrams of non-methane hydrocarbons per kilometer driven. 3. Gasoline vehicles must not emit more than 60 milligrams of nitrogen oxides per kilometer driven. 4. Gasoline vehicles must not emit more than 4.5 milligrams of PM (particulate matter) per kilometer driven. II. China 6b specifications are as follows: (1) Gasoline vehicles must not emit more than 500 milligrams of carbon monoxide per kilometer driven. (2) Gasoline vehicles must not emit more than 35 milligrams of non-methane hydrocarbons per kilometer driven. (3) Gasoline vehicles must not emit more than 35 milligrams of nitrogen oxides per kilometer driven. (4) Gasoline vehicles must not emit more than 3 milligrams of PM (particulate matter) per kilometer driven.

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