What is RVP?
Reid Vapor Pressure (RVP) is a measure of gasoline volatility, or how it evaporates. The US Environmental Protection Agency regulates the RVP of gasoline sold at retail stations from June 1 to September 15 to reduce emissions. This results in seasonal RVP shifts in the spring and fall. The higher the RVP, the higher the levels of vaporization, and vice versa. RVP levels are lower in the summer than they are in the winter.