Those cities are New York, Philadelphia, Hartford, Baltimore, Chicago, Milwaukee, Houston, San Diego, and Los Angeles. In addition, dozens of other cities are using reformulated gasoline voluntarily simply because it's a convenient, inexpensive way to improve air quality. In all, about one-third of the gasoline in the country is reformulated. The primary goal of the reformulated gasoline program is to protect public health by reducing vehicle emissions of pollutants that form ground-level ozone, often called smog. Reformulated gasoline also reduces toxic air pollutants from vehicles.
Ozone damages sensitive lung tissue and reduces lung function.
Exposure to toxic air pollutants has been linked to increased rates of cancer. Reformulated gasoline produces 15 to 17 percent less pollution than conventional gasoline, and further improvements are expected as new formulas are developed. Boat engine manufacturers have indicated that the use of reformulated gasoline in their engines is acceptable, although some offer special instructions if you use reformulated gasoline. There are a number of simple things you can do if you are concerned about using reformulated gasoline in your boat engine. However, you should always check your owner's manual first.