Federal rules mandate the sale of low Reid Vapor Pressure gasoline during the summer months because a higher RVP evaporates more easily and can add to ozone pollution and smog.

RVP ratings denote fuel volatility. Blending gasoline with butane, naphtha or other cheap additives raises the fuel's RVP rating but lowers production costs and increases the amount of fuel ...

Federal rules mandate the sale of low Reid Vapor Pressure gasoline during the summer months because a higher RVP evaporates more easily and can add to ozone pollution and smog. That is what is being ...

These rules are in place because high RVP gasoline evaporates more easily in heat and can exasperate ozone pollution and ozone-related health problems, according to the EPA.

Federal rules mandate the sale of low Reid Vapor Pressure gasoline during the summer months because a higher RVP evaporates more easily and can add to ozone pollution and smog.

Gas prices in the four states spiked higher after the storms and all have gasoline that costs more than $3.45 a gallon, according to AAA. In Illinois, it's approximately $4 a gallon, which is ...

Federal rules mandate the sale of low Reid Vapor Pressure gasoline during the summer months because a higher RVP evaporates more easily and can add to ozone pollution and smog.

The Environmental Protection Agency is issuing an emergency fuel waiver to help alleviate gasoline shortages in four Midwest states after the shutdown of an refinery in Illinois. Exxon Mobil shut ...