RVP (Reid Vapor Pressure) measures gasoline’s volatility and vapor pressure characteristics, indicating how easily the fuel evaporates at specific temperatures. RVP specifications vary seasonally and by geographic region to optimize engine performance and reduce emissions. Higher RVP gasoline evaporates more easily, affecting both performance and environmental compliance.

RVP requirements create seasonal gasoline specifications that affect refining operations, inventory management, and pricing. Summer gasoline typically requires lower RVP to reduce evaporative emissions, while winter gasoline allows higher RVP for cold-weather starting. Understanding RVP specifications helps assess gasoline market dynamics and seasonal patterns.

Real-world example: Summer gasoline requires maximum 9.0 psi RVP in most U.S. markets compared to 13.5 psi for winter gasoline, creating seasonal refining challenges and price premiums for summer-grade fuel that meets stricter volatility requirements.