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Gasoline
The standard NOM-042-SEMARNAT-2003, published in 2005, sets emissions limits for new gasoline light-duty vehicles (LDVs) and allows compliance with either U.S.-based (first table) or European-based standards (second table).
Three standard levels (A, B and C) were set to be phased in on a timeline governed by the fuel’s sulfur content, 80 mg/kg maximum and 30 mg/kg average in the case of gasoline. The year that low-sulfur fuels became available nationally was defined as “year 1”, and was expected to be 2009, but this was not achieved.
    •Standard A: limits for vehicles produced between 2004 and 2009
    •Standard B: limits for vehicles produced between 2007 and two years after “year 1”
    •Standard C: limits applicable from “year 1”
Standard B was fully phased in by 2009, and it is currently bei
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Gasoline