Gasoline is actually a mix of different blending stocks that have their own reed vapor pressure and octane - refineries blend them together to get a mix that ha

Gasoline is actually a mix of different blending stocks that have their own reed vapor pressure and octane - refineries blend them together to get a mix that has the right octane and reed vapor pressure to sell. Here is a simple overview on blending https://inside.mines.edu/~jjechura/Refining/11_Blending_Optimization.pdf https://inside.mines.edu/~jjechura/Refining/11_Blending_Opti...